Yearly & Monthly weather - Oaxaca, Mexico

The climate of Oaxaca

Located in a temperate highland zone, the city of Oaxaca, Mexico is under the sway of a Cwb Köppen climate classification, or more specifically, a temperate highland tropical climate with dry winters. An analysis of the provided climatological parameters unveils a climate marked by mild temperatures throughout the year, alterations in humidity and rainfall, as well as notable variations in daylight and sunshine hours.

Throughout the year, Oaxaca experiences relatively consistent temperatures, with average monthly highs ranging from a decent 20.6°C (69.1°F) to a peak of 26.8°C (80.2°F), while average monthly lows fluctuate between 7.8°C (46°F) and 13.3°C (55.9°F). The level of relative humidity alters over the months, with lower percentages recorded from February to April (from 62% to 68%), then increasing to peak at 86% in September, before dropping once again towards the end of the year.

In terms of precipitation, Oaxaca faces significant disparities, skewed heavily towards the summer months. Rainfall amounts kick off at a mere 5mm (0.2") to 8mm (0.31") in January and February, then escalate, peaking from June to September with the top volume reaching a substantial 203mm (7.99") in June, before drastically dwindling to 5mm (0.2") in December. In line with the rainfall, daylight hours increase from the start of the year, peaking at 13.1 hours in June and July, and then diminishing towards December again. Sunshine duration exhibits a similar trajectory but has fewer hours, peaking at 10.7 hours in May.

The best time to visit Oaxaca

Based on climatological averages, the optimal time to visit Oaxaca would be in late autumn and early winter, specifically from November to December. During this period, the city witnesses a pleasant balance of temperatures with maximums oscillating around 20.6°C (69.1°F) to 20.8°C (69.4°F) and minimums around 9.9°C (49.8°F) to 8.7°C (47.7°F), coupled with a reasonable humidity level of 80% to 75%. Moreover, this interval corresponds with low rainfall amounts of just 19mm (0.75") to 5mm (0.2") and relatively long daylight hours between 11.3 hours to 11.1 hours, offering ample time for outdoor exploration and activities.

The worst time to visit Oaxaca

The least desirable months to visit Oaxaca, climatologically speaking, would be from June to September. This period is marked by the highest rainfall, stretching from a whopping 186mm (7.32") to 200mm (7.87"), and comes with the highest recorded humidity levels, hovering around 83% to 86%. Although temperatures remain relatively mild during this time, from 22.1°C (71.8°F) to 22.2°C (72°F) in highs and from 12.7°C (54.9°F) to 13°C (55.4°F) in lows, the excessive rainfall and high humidity can make these months uncomfortable for sightseeing and outdoor activities.

Spring weather in Oaxaca

When spring comes knocking in Oaxaca, between March and May, temperatures rise modestly from 24.9°C (76.8°F) to 26.8°C (80.2°F) in highs and from 9.8°C (49.6°F) to 11.4°C (52.5°F) in lows. Rainfall starts to increase, but remains manageable, going from 20mm (0.79") in March to 37mm (1.46") in April and reaching 94mm (3.7") in May. Meanwhile, daylight hours lengthen progressively from 12.1 hours to 12.9 hours, matched with increased sunshine hours from 9.7 hours to a peak of 10.7 hours in May.

Summer weather in Oaxaca

The summer sliding in from June to August is characterized by a slight dip in temperatures, dropping from highs of 26.8°C (80.2°F) to 22.1°C (71.8°F) and lows settling between 13.3°C (55.9°F) and 12.6°C (54.7°F). This period is dominated by heavy rainfall, surging to its highest at 186mm (7.32") to 203mm (7.99"), and an increase in relative humidity to a maximum of 82% to 83%. Daylight hours dwindle slightly, from 13.1 hours to 12.7 hours, as do the sunshine hours from a peak of 9.4 hours in June to 8.6 hours in August.

Autumn weather in Oaxaca

Autumn spans from September to November, seeing temperatures vary moderately with highs dropping from 22.2°C (72°F) to 20.6°C (69.1°F), and lows decreasing from 13°C (55.4°F) to 9.9°C (49.8°F). September witnesses the most precipitation of the year at 200mm (7.87"), while rainfall dwindles drastically in October and November, reaching just 19mm (0.75"). Relative humidity starts to taper off from a peak in September to around 83% by November. Conversely, sunshine hours increase from 8.3 hours to 8.1 hours as daylight hours wane from 12.2 hours to 11.3 hours.

Winter weather in Oaxaca

Winter in Oaxaca spans from December until February with temperatures remaining mild. Highs vary slightly between 20.8°C (69.4°F) and 20.7°C (69.3°F), while lows range between 9.9°C (49.8°F) and 7.8°C (46°F) in the same period. Rainfall is limited during these months, with only 5mm (0.2") to 8mm (0.31") expected. However, relatively high humidity levels persist, ranging from 75% to 73%. Both daylight and sunshine hours are at their lowest towards year-end, reaching down to 11.1 hours and 7.4 hours respectively.

Weather in January

A remarkable trait of January in Oaxaca, Mexico is balmy days with high temperatures averaging 20.7°C (69.3°F). The city experiences relatively cool nights, necessitating warmer clothing for those venturing outdoors after sundown. Weather in January »

Weather in February

The weather in Oaxaca takes a gradual turn towards warmth in February. The city witnesses a nominal increase in average high temperatures compared to January. February carries on the low precipitation trend from the previous month, keeping the city's weather dry and conducive for tourism. Weather in February »

Weather in March

By March, Oaxaca's weather begins to heat up, notching the mercury up to an average high of 24.9°C (76.8°F). The change from February is apparent as days grow longer and warmer. Despite the heat, the month sees significantly more rainfall than the first two months of the year. Weather in March »

Weather in April

April ushers in higher temperatures and more extended daylight hours in the city of Oaxaca. Compared to March, April sees a perceptible increase in the heat marking the progression towards the summer season. This month experiences a rise in rainfall amounts, resulting in lush vegetation throughout the region. Weather in April »

Weather in May

May serves as a prelude to Oaxaca's wet season, evidenced by the significant increase in rainfall to 94mm (3.7"). Notwithstanding the precipitation, May relishes higher temperatures and more extended daylight hours than the previous month. Weather in May »

Weather in June

June stands out in Oaxaca for its dramatic surge in rainfall, recording a high of 203mm (7.99"). This indicates the onset of the wet season in the region. Accompanying increased precipitation are longer sunlight hours, although cloud cover tends to obscure the sun more frequently. Weather in June »

Weather in July

July in Oaxaca shares a similar weather pattern with June marked by high temperatures, copious rainfall, and a decrease in sunshine hours. However, the quantity of rainfall sees a slight decline from June's peak. This period also retains high humidity levels, making the heat feel more intense. Weather in July »

Weather in August

Oaxaca in August continues the trend of tropical summer settings followed by heavy, but tapering rainfall. The city's weather stays warm, echoing temperatures from the previous month. As the monsoon season persists, increased cloud cover becomes a permanent fixture in the sky. Weather in August »

Weather in September

Despite the arrival of autumn, September in Oaxaca retains lingering summer patterns with high temperatures and heavy rainfall reaching up to 200mm (7.87"). The humidity remains dominant, accentuating the heat, especially during the daytime. Weather in September »

Weather in October

In October, Oaxaca begins transitioning into cooler weather, with declining average high temperatures compared to September. A remarkable weather feature in October is the substantial reduction in rainfall to 98mm (3.86"), indicating the end of the wet season. Weather in October »

Weather in November

November in Oaxaca ushers in an undeniable autumn feel, bearing cooler temperatures and lower rainfall compared to its predecessor, October. Weather patterns change notably, with precipitations dwindling further. In this period, Oaxaca receives nominal rainfall amounts, marking a significant variance from the wet season. Weather in November »

Weather in December

In December, Oaxaca rounds off the year with a continuation of the cooling trend, offering comfortable day temperatures and cool nights. Rainfall keeps on declining, barely leaving the city with only 5mm (0.2") of rainfall. The decrease in precipitation aligns with increased sunlight during the day, providing more significant amounts of sunshine. Weather in December »

Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How many days does it rain in Oaxaca?

Throughout the year, in Oaxaca, Mexico, there are 222.9 rainfall days, and 1066mm (41.97") of precipitation is accumulated.

What are the months with the lowest UV index in Oaxaca?

The months with the lowest UV index in Oaxaca, Mexico, are January, October through December, with an average maximum UV index of 4.

When is the highest UV index in Oaxaca?

The months with the highest UV index are February through September, with an average maximum UV index of 5.

What is the warmest month in Oaxaca?

In Oaxaca, the peak average temperatures are observed in April, with a high of 26.8°C (80.2°F) and a low of 11.4°C (52.5°F).

What is the least humid month in Oaxaca?

The least humid month in Oaxaca, Mexico, is April, with an average relative humidity of 62%.

What month has the most sunshine in Oaxaca?

The month with the most sunshine is May, with an average of 10.7h of sunshine.

What is the wettest month in Oaxaca?

June is the month with the most rainfall in Oaxaca, Mexico. Rain falls for 27.8 days and accumulates 203mm (7.99") of precipitation.

When are the longest days in Oaxaca?

The month with the longest days in Oaxaca is June, with an average of 13h and 6min of daylight.

What is the most humid month in Oaxaca?

The most humid month in Oaxaca is September, with an average relative humidity of 86%.

What part of the year is the coldest in Oaxaca?

Oaxaca's coldest month, November, generally records average temperatures ranging from a high of 20.6°C (69.1°F) to a low of 9.9°C (49.8°F).

What is the month with the least sunshine in Oaxaca?

November has the least sunshine of the year in Oaxaca, Mexico, with an average of 7.4h of sunshine.

What is the driest month in Oaxaca?

The month with the least rainfall is December, when the rain falls for 7.5 days and typically collects 5mm (0.2") of precipitation.

What is the month with the shortest days in Oaxaca?

December has the shortest days of the year in Oaxaca, with an average of 11h and 6min of daylight.

Is there Daylight Saving Time (DST) in Oaxaca?

Oaxaca, Mexico, does not observe Daylight Saving Time (DST). CST timezone is used throughout the entire year.

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Year J F M A M J J A S O N D

Average temperature
Oaxaca, Mexico

Average high temperature in January:
20.7°C
Average high temperature in February:
23.3°C
Average high temperature in March:
24.9°C
Average high temperature in April:
26.8°C
Average high temperature in May:
25.9°C
Average high temperature in June:
22.3°C

Average high temperature in July:
22.1°C
Average high temperature in August:
22.2°C
Average high temperature in September:
21.1°C
Average high temperature in October:
21.3°C
Average high temperature in November:
20.6°C
Average high temperature in December:
20.8°C

The warmest month (with the highest average high temperature) is April (26.8°C).
The month with the lowest average high temperature is November (20.6°C).

Average low temperature in January:
7.8°C
Average low temperature in February:
8.4°C
Average low temperature in March:
9.8°C
Average low temperature in April:
11.4°C
Average low temperature in May:
13.1°C
Average low temperature in June:
13.3°C

Average low temperature in July:
12.7°C
Average low temperature in August:
12.6°C
Average low temperature in September:
13°C
Average low temperature in October:
11.7°C
Average low temperature in November:
9.9°C
Average low temperature in December:
8.7°C

The month with the highest average low temperature is June (13.3°C).
The coldest month (with the lowest average low temperature) is January (7.8°C).

Average pressure
Oaxaca, Mexico

Average pressure in January:
1017.1mbar
Average pressure in February:
1015.6mbar
Average pressure in March:
1015mbar
Average pressure in April:
1013.3mbar
Average pressure in May:
1012.9mbar
Average pressure in June:
1013.3mbar

Average pressure in July:
1014.9mbar
Average pressure in August:
1014.2mbar
Average pressure in September:
1013.6mbar
Average pressure in October:
1014.3mbar
Average pressure in November:
1016mbar
Average pressure in December:
1016.3mbar

The month with the highest atmospheric pressure is January (1017.1mbar).
The month with the lowest atmospheric pressure is May (1012.9mbar).

Average wind speed
Oaxaca, Mexico

Average wind speed in July:
6.2km/h
Average wind speed in August:
5.8km/h
Average wind speed in September:
5.5km/h
Average wind speed in October:
6.7km/h
Average wind speed in November:
7.3km/h
Average wind speed in December:
6.5km/h

The windiest month (with the highest average wind speed) is November (7.3km/h).
The calmest months (with the lowest average wind speed) are May and June (5.3km/h).

Average humidity
Oaxaca, Mexico

The month with the highest relative humidity is September (86%).
The month with the lowest relative humidity is April (62%).

Average rainfall
Oaxaca, Mexico

The wettest month (with the highest rainfall) is June (203mm).
The driest month (with the least rainfall) is December (5mm).

Average rainfall days
Oaxaca, Mexico

Average rainfall days in January:
7.8 days
Average rainfall days in February:
7 days
Average rainfall days in March:
12.3 days
Average rainfall days in April:
16.5 days
Average rainfall days in May:
22.6 days
Average rainfall days in June:
27.8 days

Average rainfall days in July:
28.5 days
Average rainfall days in August:
28.7 days
Average rainfall days in September:
28.8 days
Average rainfall days in October:
22.6 days
Average rainfall days in November:
12.8 days
Average rainfall days in December:
7.5 days

The month with the highest number of rainy days is September (28.8 days).
The month with the least rainy days is February (7 days).

Average daylight / Average sunshine
Oaxaca, Mexico

Average daylight in January:
11h and 1min
Average daylight in February:
11h and 4min
Average daylight in March:
12h and 1min
Average daylight in April:
12h and 3min
Average daylight in May:
12h and 5min
Average daylight in June:
13h and 1min

Average daylight in July:
13h and 0min
Average daylight in August:
12h and 4min
Average daylight in September:
12h and 1min
Average daylight in October:
11h and 4min
Average daylight in November:
11h and 2min
Average daylight in December:
11h and 1min

The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 6min).

Average sunshine in January:
9h and 4min
Average sunshine in February:
9h and 5min
Average sunshine in March:
9h and 4min
Average sunshine in April:
9h and 4min
Average sunshine in May:
10h and 4min
Average sunshine in June:
9h and 2min

Average sunshine in July:
8h and 4min
Average sunshine in August:
8h and 4min
Average sunshine in September:
8h and 2min
Average sunshine in October:
8h and 1min
Average sunshine in November:
7h and 2min
Average sunshine in December:
8h and 1min

The month with the most sunshine is May (Average sunshine: 10h and 42min).
The month with the least sunshine is November (Average sunshine: 7h and 24min).

Average sunshine days
Oaxaca, Mexico

Average sunshine days in January:
17.6 days
Average sunshine days in February:
16.3 days
Average sunshine days in March:
11.8 days
Average sunshine days in April:
8.1 days
Average sunshine days in May:
4.4 days
Average sunshine days in June:
1.1 days

Average sunshine days in July:
1.2 days
Average sunshine days in August:
1.4 days
Average sunshine days in September:
0.4 days
Average sunshine days in October:
5.3 days
Average sunshine days in November:
11.6 days
Average sunshine days in December:
18.5 days

The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is September (0.4 days).

Average UV index
Oaxaca, Mexico

The months with the highest UV index are February, March, April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, October, November and December (UV index 4).

Average cloud cover
Oaxaca, Mexico

The month with the most cloud cover is September (Cloud cover 54).
The month with the least cloud cover is March (Cloud cover 21).

Average visibility
Oaxaca, Mexico

The months with the highest visibility are January, February, March, April and May (9km).
The months with the lowest visibility are July, August, September, October and November (7km).

Climate and monthly weather forecastOaxaca, Mexico

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