Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
As March transitions into April, a subtle temperature shift is observed, with average highs adjusting from a comfortable 64°F (17.8°C) to a pleasant 71.6°F (22°C). Throughout April nights, a significant departure from daytime temperatures, with an average low of 48.6°F (9.2°C), is recognized in Princeton.Humidity
In April, the average relative humidity is 60%.Rainfall
In Princeton, in April, it is raining for 7.3 days, with typically 0.47" (12mm) of accumulated precipitation. In Princeton, during the entire year, the rain falls for 58.9 days and collects up to 6.89" (175mm) of precipitation.Daylight
In April, the average length of the day is 13h and 16min.On the first day of the month, sunrise is at 6:50 am and sunset at 7:32 pm. On the last day of April, sunrise is at 6:09 am and sunset at 8:01 pm PDT.
Sunshine
The average sunshine in April is 10.2h.UV index
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 exposure to the Sun's UV rays for the average person.Note: In April, an average UV index of 5 transforms into the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What are the temperatures in Princeton in April?
What is the average humidity in April in Princeton?
How much does it rain in Princeton in April?
What is the average length of the day in April in Princeton?
When is the sunrise / sunset in April in Princeton?
How long on average sun shines in April in Princeton?
How high is the UV index in April in Princeton?
Average temperature in April
Princeton, CA
- Average high temperature in April: 71.6°F
The warmest month (with the highest average high temperature) is July (98.8°F).
The month with the lowest average high temperature is December (54.5°F).
- Average low temperature in April: 48.6°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is December (42.1°F).
Average pressure in April
Princeton, CA
- Average pressure in April: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in April
Princeton, CA
- Average wind speed in April: 6.3mph
The windiest month (with the highest average wind speed) is March (6.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in April
Princeton, CA
- Average humidity in April: 60%
The month with the highest relative humidity is March (71%).
The month with the lowest relative humidity is September (36%).
Average rainfall in April
Princeton, CA
- Average rainfall in April: 0.47"
The wettest months (with the highest rainfall) are February and December (1.3").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in April
Princeton, CA
- Average rainfall days in April: 7.3 days
The month with the highest number of rainy days is March (10.4 days).
The month with the least rainy days is July (1 days).
Average daylight in April /
Average sunshine in April
Princeton, CA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in April: 10h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in April
Princeton, CA
- Average sunshine days in April: 21.3 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (19.7 days).
Average UV index in April
Princeton, CA
- Average UV index in April: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in April
Princeton, CA
- Average cloud cover in April: 27
The months with the most cloud cover are March and December (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in April
Princeton, 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).
Princeton, California, USA
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