May weather forecast and climate
Callahan, CA

Weather in May

May, the last month of the spring, in Callahan, is an enjoyable month, with average temperature varying between 38.8°F (3.8°C) and 63.9°F (17.7°C).

Temperature

In Callahan, the average high-temperature increases, from a cool 54.7°F (12.6°C) in April, to a comfortable 63.9°F (17.7°C). In May, in Callahan, the average low-temperature is 38.8°F (3.8°C).

Humidity

In May, the average relative humidity in Callahan is 65%.

Rainfall

In Callahan, in May, it is raining for 12.8 days, with typically 2.17" (55mm) of accumulated precipitation. In Callahan, during the entire year, the rain falls for 107.9 days and collects up to 24.76" (629mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. May is the last month it regularly snows. During 0.8 snowfall days, in May, Callahan aggregates 0.2" (5mm) of snow. In Callahan, during the entire year, snow falls for 47.5 days, and aggregates up to 57.4" (1458mm) of snow.

Daylight

The average length of the day in Callahan is 14.5h.

Sunshine

The average sunshine in May is 10.9h.

UV index

The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 4 in May transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Callahan?

The average high-temperature, in May, in Callahan, is 63.9°F (17.7°C), while the average low-temperature is 38.8°F (3.8°C).

What is the average humidity in May in Callahan?

The average relative humidity in May is 65%.

How much does it rain in Callahan in May?

In Callahan, in May, during 12.8 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

What is the last month it snows in Callahan?

May is the last month it regularly snows in Callahan, California. During 0.8 snowfall days, in May, Callahan aggregates 0.2" (5mm) of snow.

How many hours of daylight does Callahan have in May?

In Callahan, California, the average length of the day in May is 14.5h.

How long on average sun shines in May in Callahan?

The average sunshine in May in Callahan is 10.9h.

What is the UV index reading in May in Callahan?

In Callahan, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in May
Callahan, CA

Average temperature in May - Callahan, CA
  • Average high temperature in May: 63.9°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is December (41°F).

  • Average low temperature in May: 38.8°F

The month with the highest average low temperature is July (51.1°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

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Average pressure in May
Callahan, CA

Average pressure in May - Callahan, CA
  • Average pressure in May: 29.97"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is August (29.94").

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Average wind speed in May
Callahan, CA

Average wind speed in May - Callahan, CA
  • Average wind speed in May: 5mph

The windiest month (with the highest average wind speed) is March (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

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Average humidity in May
Callahan, CA

Average humidity in May - Callahan, CA
  • Average humidity in May: 65%

The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (45%).

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Average rainfall in May
Callahan, CA

Average rainfall in May - Callahan, CA
  • Average rainfall in May: 2.17"

The wettest month (with the highest rainfall) is March (4.17").
The driest months (with the least rainfall) are July and August (0.31").

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Average rainfall days in May
Callahan, CA

Average rainfall days in May - Callahan, CA
  • Average rainfall days in May: 12.8 days

The month with the highest number of rainy days is March (14.6 days).
The month with the least rainy days is August (3.1 days).

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Average snowfall in May
Callahan, CA

Average snowfall in May - Callahan, CA
  • Average snowfall in May: 0.2"

The month with the highest snowfall is March (14.02").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Callahan, CA

Average snowfall days in May - Callahan, CA
  • Average snowfall days in May: 0.8 days

The month with the highest number of snowfall days is March (11.2 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in May /
Average sunshine in May
Callahan, CA

Average daylight in May / Average sunshine in May - Callahan, CA
  • Average daylight in May: 14.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in May: 10.9h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.4h).

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Average sunshine days in May
Callahan, CA

Average sunshine days in May - Callahan, CA
  • Average sunshine days in May: 15.1 days

The month with the most sunshine days is August (24.1 days).
The month with the least sunshine days is March (10.9 days).

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Average UV index in May
Callahan, CA

Average UV index in May - Callahan, CA
  • Average UV index in May: 4

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in May
Callahan, CA

Average cloud cover in May - Callahan, CA
  • Average cloud cover in May: 27

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 7).

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Average visibility in May
Callahan, CA

Average visibility in May - Callahan, CA
  • Average visibility in May: 6mi

Months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February, March and December (5mi).

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