May weather forecastNicasio, CA

May

Weather in May

May, the last month of the spring in Nicasio, is another refreshing month, with an average temperature fluctuating between 67.1°F (19.5°C) and 49.5°F (9.7°C).

Temperature

May commences with an average high-temperature of a still enjoyable 67.1°F (19.5°C), showing little deviation from April's 64°F (17.8°C). An average low-temperature of 49.5°F (9.7°C) marks the nights throughout May.

Humidity

The average relative humidity in May is 73%.

Rainfall

In Nicasio, in May, it is raining for 5.5 days, with typically 0.39" (10mm) of accumulated precipitation. In Nicasio, during the entire year, the rain falls for 68.4 days and collects up to 7.28" (185mm) of precipitation.

Daylight

In May, the average length of the day is 14h and 15min.
On the first day of the month, sunrise is at 6:13 am and sunset at 8:02 pm. On the last day of May, in Nicasio, California, sunrise is at 5:49 am and sunset at 8:27 pm PDT.

Sunshine

The average sunshine in May in Nicasio is 10.5h.

UV index

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: An average maximum UV index of 5 in May leads to these recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.

Updated: Feb 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in May, in Nicasio, is 67.1°F (19.5°C), while the low-temperature averages to 49.5°F (9.7°C).

In Nicasio, California, the average relative humidity in May is 73%.

In Nicasio, California, in May, during 5.5 rainfall days, 0.39" (10mm) of precipitation is typically accumulated.

In Nicasio, California, the average day length in May is 14h and 15min.

On the first day of May in Nicasio, sunrise is at 6:13 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:27 pm PDT.

The average sunshine duration in May in Nicasio, California, is 10.5h.

In May, the average daily maximum UV index in Nicasio, California, is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

64°F

67.1°F

72.5°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.8mph

8mph

7.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

21.7

21.8

24.5

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Nicasio, CA

Average high temperature in May: 67.1°F

The warmest month (with the highest average high temperature) is September (75.4°F).
The month with the lowest average high temperature is December (55.2°F).

Average low temperature in May: 49.5°F

The month with the highest average low temperature is September (55.8°F).
The coldest month (with the lowest average low temperature) is December (43.9°F).

Average pressure in May
Nicasio, CA

Average pressure in May: 29.98"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 May
Nicasio, CA

Average wind speed in May: 7.3mph

The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).

Average humidity in May
Nicasio, CA

Average humidity in May: 73%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (66%).

Average rainfall in May
Nicasio, CA

Average rainfall in May: 0.39"

The wettest month (with the highest rainfall) is February (1.65").
The driest months (with the least rainfall) are July, August and September (0.08").

Average rainfall days in May
Nicasio, CA

Average rainfall days in May: 5.5 days

The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is June (2 days).

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

Average daylight in May: 14h and 18min

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 May: 10h and 30min

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 36min).

Average sunshine days in May
Nicasio, CA

Average sunshine days in May: 21.8 days

The month with the most sunshine days is October (24.9 days).
The month with the least sunshine days is March (18.5 days).

Average UV index in May
Nicasio, CA

Average UV index in May: 5

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in May
Nicasio, CA

Average cloud cover in May: 28

The month with the most cloud cover is March (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 14).

Average visibility in May
Nicasio, CA

Average visibility in May: 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).