April weather forecastSan Anselmo, CA
April
Weather in April
April in San Anselmo testifies to a considerable leap in temperatures reaching 62.8°F (17.1°C), signifying a clear progression towards summer. The lengthening of days ushers in more sunshine hours. The city witnesses the commencement of the dry spell with the average rain tapering down to 0.2" (5mm). A combination of less rainfall and increased sun exposure leads to a drop in humidity to 74%. The city sees a consistent wind speed, contributing to the mild weather conditions typical of a Californian spring.Temperature
The shift from March to April is characterized by an average high-temperature of a still refreshing 62.8°F (17.1°C), not significantly different from the 59.4°F (15.2°C) of March. Nightly temperatures drop to an average low of 48.6°F (9.2°C) in April.Humidity
In April, the average relative humidity is 74%.Rainfall
In April, the rain falls for 5.5 days. Throughout April, 0.2" (5mm) of precipitation is accumulated. In San Anselmo, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.Daylight
In April, the average length of the day is 13h and 13min.On the first day of April, sunrise is at 6:53 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 8:00 pm PDT.
Sunshine
The average sunshine in April is 10h.UV index
The months with the highest UV index are April, June through September, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during April translates into these guidelines:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
San Anselmo, CA
- Average high temperature in April: 62.8°F
The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in April: 48.6°F
The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).
Average pressure in April
San Anselmo, CA
- Average pressure in April: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in April
San Anselmo, CA
- Average wind speed in April: 7.6mph
The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).
Average humidity in April
San Anselmo, CA
- Average humidity in April: 74%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall in April
San Anselmo, CA
- Average rainfall in April: 0.2"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in April
San Anselmo, CA
- Average rainfall days in April: 5.5 days
The month with the highest number of rainy days is March (8.8 days).
The months with the least rainy days are June and August (1.2 days).
Average daylight in April /
Average sunshine in April
San Anselmo, CA
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 10h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in April
San Anselmo, CA
- Average sunshine days in April: 23.3 days
The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).
Average UV index in April
San Anselmo, CA
- Average UV index in April: 5
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in April
San Anselmo, CA
- Average cloud cover in April: 30
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in April
San Anselmo, CA
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
