March weather forecast
San Francisco, Costa Rica

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Weather in March

March denotes a transition into warmer weather, with a discernible increase in temperatures from February. Despite the warmer weather, rainfall slightly increases to 21mm (0.83"), reminding us that San Francisco still experiences scattered showers. The evident consistency in the UV index, standing at 6, should instigate preventative measures against sunburn. As March rolls on, it becomes evident that weather patterns are shifting quite considerably. These shifts set the foundation for staggering transitions in the incoming months.

Temperature

The highest point of temperatures in San Francisco, Costa Rica, falls in March and April, when the average high-temperature ascends to 29.7°C (85.5°F).

Heat index

The heat index value for March is estimated at a tropical 34°C (93.2°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.

Humidity

With an average relative humidity of 70%, March is the least humid month in San Francisco.

Rainfall

In March, the rain falls for 14.5 days. Throughout March, 21mm (0.83") of precipitation is accumulated. Throughout the year, there are 272 rainfall days, and 2217mm (87.28") of precipitation is accumulated.

Daylight

The average length of the day in March is 12h and 5min.
On the first day of the month, sunrise is at 05:50 and sunset at 17:46. On the last day of March, sunrise is at 05:33 and sunset at 17:46 CST.

Sunshine

With an average of 9.4h of sunshine, March has the most sunshine of the year in San Francisco.

UV index

The months with the highest UV index are January through April, June, July, September, October and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: An average UV index of 6 in March transforms into this advice:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Boost your sun resistance with garments that are densely woven yet spacious.

Frequently asked questions

What is the hottest time of year in San Francisco?

In San Francisco, Costa Rica, March and April are characterised by the peak of temperatures, recording an average high of 29.7°C (85.5°F).

How hot is it in San Francisco in March?

In San Francisco, 29.7°C (85.5°F) is the average high-temperature and 17.9°C (64.2°F) is the average low-temperature during March. In March, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is estimated at 34°C (93.2°F).

What is the least humid month in San Francisco?

The least humid month is March, with an average relative humidity of 70%.

What is the average humidity in March in San Francisco?

The average relative humidity in March in San Francisco is 70%.

How many days does it rain in March in San Francisco?

In San Francisco, in March, during 14.5 rainfall days, 21mm (0.83") of precipitation is typically accumulated.

What is the average length of the day in March in San Francisco?

The average day length in March in San Francisco is 12h and 5min.

What time are sunrise and sunset in March in San Francisco?

On the first day of March in San Francisco, Costa Rica, sunrise is at 05:50 and sunset at 17:46. On the last day of the month, sunrise is at 05:33 and sunset at 17:46 CST.

What month has the most sunshine in San Francisco?

March has the most sunshine of the year in San Francisco, with an average of 9.4h of sunshine.

How many hours of sunshine does San Francisco have in March?

In March, the average sunshine duration is 9.4h.

What are the months with the highest UV index in San Francisco?

January through April, June, July, September, October and December, with an average maximum UV index of 6, are months with the highest UV index in San Francisco.

How high is the UV index in March in San Francisco?

In March, the average daily maximum UV index in San Francisco, Costa Rica, is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in March
San Francisco, Costa Rica

Average temperature in March - San Francisco, Costa Rica
  • Average high temperature in March: 29.7°C

The warmest months (with the highest average high temperature) are March and April (29.7°C).
The month with the lowest average high temperature is October (25.4°C).

  • Average low temperature in March: 17.9°C

The month with the highest average low temperature is May (19.8°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).

Average pressure in March
San Francisco, Costa Rica

Average pressure in March - San Francisco, Costa Rica
  • Average pressure in March: 1011.9mbar

The month with the highest atmospheric pressure is January (1012.1mbar).
The month with the lowest atmospheric pressure is October (1010.7mbar).

Average wind speed in March
San Francisco, Costa Rica

Average wind speed in March - San Francisco, Costa Rica
  • Average wind speed in March: 9.5km/h

The windiest month (with the highest average wind speed) is February (10.6km/h).
The calmest month (with the lowest average wind speed) is September (3.8km/h).

Average humidity in March
San Francisco, Costa Rica

Average humidity in March - San Francisco, Costa Rica
  • Average humidity in March: 70%

The month with the highest relative humidity is October (89%).
The month with the lowest relative humidity is March (70%).

Average rainfall in March
San Francisco, Costa Rica

Average rainfall in March - San Francisco, Costa Rica
  • Average rainfall in March: 21mm

The wettest month (with the highest rainfall) is October (396mm).
The driest month (with the least rainfall) is February (17mm).

Average rainfall days in March
San Francisco, Costa Rica

Average rainfall days in March - San Francisco, Costa Rica
  • Average rainfall days in March: 14.5 days

The month with the highest number of rainy days is October (30.2 days).
The month with the least rainy days is February (10.3 days).

Average daylight in March /
Average sunshine in March
San Francisco, Costa Rica

Average daylight in March / Average sunshine in March - San Francisco, Costa Rica
  • Average daylight in March: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).

  • Average sunshine in March: 9h and 2min

The month with the most sunshine is March (Average sunshine: 9h and 24min).
The month with the least sunshine is October (Average sunshine: 7h and 0min).

Average sunshine days in March
San Francisco, Costa Rica

Average sunshine days in March - San Francisco, Costa Rica
  • Average sunshine days in March: 14.6 days

The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is September (0.5 days).

Average UV index in March
San Francisco, Costa Rica

Average UV index in March - San Francisco, Costa Rica
  • Average UV index in March: 6

The months with the highest UV index are January, February, March, April, June, July, September, October and December (UV index 6).
The months with the lowest UV index are May, August and November (UV index 5).

Average cloud cover in March
San Francisco, Costa Rica

Average cloud cover in March - San Francisco, Costa Rica
  • Average cloud cover in March: 23

The month with the most cloud cover is October (Cloud cover 54).
The month with the least cloud cover is February (Cloud cover 19).

Average visibility in March
San Francisco, Costa Rica

Average visibility in March - San Francisco, Costa Rica
  • Average visibility in March: 10km

The months with the highest visibility are February and March (10km).
The months with the lowest visibility are August, September, October and November (7km).

San Francisco, Costa Rica

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