April weather forecastGuerneville, CA
April
Weather in April
April in Guerneville, California, is a comfortable spring month, with an average temperature varying between 65.7°F (18.7°C) and 44.8°F (7.1°C).Temperature
Guerneville, California, starts April with an average high-temperature of a still refreshing 65.7°F (18.7°C), hinting at a minimal fluctuation from March. April nights observe an average temperature dip to a frosty 44.8°F (7.1°C).Humidity
In Guerneville, the average relative humidity in April is 72%.Rainfall
In Guerneville, in April, it is raining for 5.6 days, with typically 0.51" (13mm) of accumulated precipitation. In Guerneville, during the entire year, the rain falls for 60.1 days and collects up to 12.87" (327mm) of precipitation.Daylight
In April, the average length of the day in Guerneville, California, is 13h and 14min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:35 pm. On the last day of April, in Guerneville, sunrise is at 6:14 am and sunset at 8:03 pm PDT.
Sunshine
In Guerneville, the average sunshine in April is 9.8h.UV index
In Guerneville, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 5 in April transforms into this advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Guerneville, CA
- Average high temperature in April: 65.7°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in April: 44.8°F
The months with the highest average low temperature are August and September (53.4°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in April
Guerneville, 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
Guerneville, CA
- Average wind speed in April: 7.1mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in April
Guerneville, CA
- Average humidity in April: 72%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).
Average rainfall in April
Guerneville, CA
- Average rainfall in April: 0.51"
The wettest month (with the highest rainfall) is February (3.27").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in April
Guerneville, CA
- Average rainfall days in April: 5.6 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).
Average daylight in April /
Average sunshine in April
Guerneville, 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 30min).
- Average sunshine in April: 9h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in April
Guerneville, CA
- Average sunshine days in April: 23.3 days
The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is February (19.9 days).
Average UV index in April
Guerneville, CA
- Average UV index in April: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in April
Guerneville, CA
- Average cloud cover in April: 32
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in April
Guerneville, 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).
