April weather forecast
San Martin, CA

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Weather in April

April, the same as March, is another refreshing spring month in San Martin, California, with temperature in the range of an average low of 42.6°F (5.9°C) and an average high of 67.5°F (19.7°C).

Temperature

San Martin experiences a subtle adjustment in high-temperatures to a still comfortable 67.5°F (19.7°C) with the onset of April, maintaining near parity with March's 62.6°F (17°C). With a notable difference from peak temperatures, an average of 42.6°F (5.9°C) marks the nights in April.

Humidity

The average relative humidity in April is 69%.

Rainfall

In April, the rain falls for 7.8 days. Throughout April, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 70.6 rainfall days, and 10.83" (275mm) of precipitation is accumulated.

Daylight

The average length of the day in April is 13h and 11min.
On the first day of the month, sunrise is at 6:50 am and sunset at 7:29 pm. On the last day of April, sunrise is at 6:11 am and sunset at 7:55 pm PDT.

Sunshine

In San Martin, the average sunshine in April is 10.4h.

UV index

In April, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: In April, the UV index of 5 transforms into the following advice:
Take necessary precautions - Defending against sun damage is advocated. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.

Frequently asked questions

What are April temperatures?

In April, in San Martin, the average high-temperature is 67.5°F (19.7°C), and the average low-temperature is 42.6°F (5.9°C).

What is the average humidity in April in San Martin?

The average relative humidity in April is 69%.

How many days does it rain in April?

In San Martin, California, in April, during 7.8 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

How many hours of daylight does San Martin have in April?

The average day length in April is 13h and 11min.

What time are sunrise and sunset in April?

In April, on the first day of the month, sunrise is at 6:50 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 7:55 pm PDT.

How many hours of sunshine does San Martin have in April?

In San Martin, the average sunshine duration in April is 10.4h.

How high is the UV index in April?

In San Martin, the average daily maximum UV index in April is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
San Martin, CA

Average temperature in April - San Martin, CA
  • Average high temperature in April: 67.5°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (55.8°F).

  • Average low temperature in April: 42.6°F

The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

Average pressure in April
San Martin, CA

Average pressure in April - San Martin, CA
  • Average pressure in April: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

Average wind speed in April
San Martin, CA

Average wind speed in April - San Martin, CA
  • Average wind speed in April: 5.1mph

The windiest month (with the highest average wind speed) is May (5.4mph).
The calmest month (with the lowest average wind speed) is November (3.9mph).

Average humidity in April
San Martin, CA

Average humidity in April - San Martin, CA
  • Average humidity in April: 69%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (55%).

Average rainfall in April
San Martin, CA

Average rainfall in April - San Martin, CA
  • Average rainfall in April: 0.87"

The wettest month (with the highest rainfall) is December (1.97").
The driest months (with the least rainfall) are June, July and August (0.08").

Average rainfall days in April
San Martin, CA

Average rainfall days in April - San Martin, CA
  • Average rainfall days in April: 7.8 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (1 days).

Average daylight in April /
Average sunshine in April
San Martin, CA

Average daylight in April / Average sunshine in April - San Martin, CA
  • Average daylight in April: 13h and 1min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in April: 10h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in April
San Martin, CA

Average sunshine days in April - San Martin, CA
  • Average sunshine days in April: 21.1 days

The month with the most sunshine days is August (28.7 days).
The month with the least sunshine days is March (16.8 days).

Average UV index in April
San Martin, CA

Average UV index in April - San Martin, 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
San Martin, CA

Average cloud cover in April - San Martin, CA
  • Average cloud cover in April: 28

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 5).

Average visibility in April
San Martin, CA

Average visibility in April - San Martin, 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).

San Martin, California, USA

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