May weather forecast
Santa Rosa, CA

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Set in a scenic valley, the Camarillo region of Santa Rosa, California, has great modern homes and is neared by scenic rugged mountain layouts
Set in a scenic valley, the Camarillo region of Santa Rosa, California, has great modern homes and is neared by scenic rugged mountain layouts

Weather in May

In Santa Rosa, May ushers in the warmer temperatures associated with late spring and early summer. The notable decrease in rainfall, down to 0.55", is indicative of the drier season ahead. Also, the rise in temperature reflects the changing seasons in a subtle, climatic transition. The wind calms down slightly as compared to April, indicating stable weather. The trend of increased daylight hours continues into May, with substantially longer days as compared to those in winter.

Temperature

Santa Rosa registers an average high-temperature of a pleasant 69.1°F at the commencement of May, closely related to the preceding month. During the month of May, Santa Rosa experiences a steady low-temperature average of 48.6°F.

Humidity

In Santa Rosa, California, the average relative humidity in May is 70%.

Rainfall

In Santa Rosa, in May, it is raining for 5.3 days, with typically 0.55" of accumulated precipitation. In Santa Rosa, during the entire year, the rain falls for 72.8 days and collects up to 12.01" of precipitation.

Daylight

In Santa Rosa, California, the average length of the day in May is 14h and 17min.
On the first day of May, sunrise is at 6:13 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:28 pm PDT.

Sunshine

The average sunshine in May in Santa Rosa is 10.5h.

UV index

In Santa Rosa, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 5 during May translates into the following directions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Enhance your sun protection with tightly woven, yet airy clothing.
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FAQ

What is the usual temperature for Santa Rosa in May?

The high-temperature, in May, in Santa Rosa, records 69.1°F, while the low-temperature is 48.6°F.

What is the average humidity in May in Santa Rosa?

In May, the average relative humidity is 70%.

How many days does it rain in May in Santa Rosa?

In May, in Santa Rosa, the rain falls for 5.3 days. Throughout May, 0.55" of precipitation is accumulated.

How many hours of daylight does Santa Rosa have in May?

In Santa Rosa, California, the average day length in May is 14h and 17min.

When is the sunrise / sunset in May in Santa Rosa?

In May, on the first day of the month, sunrise is at 6:13 am and sunset at 8:02 pm. On the last day of the month, in Santa Rosa, sunrise is at 5:48 am and sunset at 8:28 pm PDT.

How long on average sun shines in May in Santa Rosa?

In Santa Rosa, California, the average sunshine duration in May is 10.5h.

What is the UV index intensity in May in Santa Rosa?

In May, the average daily maximum UV index in Santa Rosa is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMayJJASOND
Apr
May
Jun
Average high temperature
64.9°F
69.1°F
76.3°F
Average low temperature
45.5°F
48.6°F
53.1°F
Average pressure
30.03"Hg
29.98"Hg
29.92"Hg
Average wind speed
7mph
7.1mph
6.8mph
Average max. wind speed
7.6mph
7.8mph
7.5mph
Average wind speed gusts
10.9mph
10.7mph
10mph
Average humidity
72%
70%
65%
Average rainfall
0.55"
0.55"
0.12"
Average rainfall days
7
5.3
1.9
Average daylight
13h 1min
14h 2min
14h 5min
Average sunshine
10h 1min
10h 3min
11h 4min
Average sunshine days
21.8
23.4
26.5
Average UV index
5
5
6
Average cloud cover
29%
26%
14%
Average visibility
6mi
6mi
6mi

Average temperature in May
Santa Rosa, CA

Average temperature in May - Santa Rosa, CA
  • Average high temperature in May: 69.1°F

The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in May: 48.6°F

The months with the highest average low temperature are August and September (54.7°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

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Average pressure in May
Santa Rosa, CA

Average pressure in May - Santa Rosa, 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).

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Average wind speed in May
Santa Rosa, CA

Average wind speed in May - Santa Rosa, CA
  • Average wind speed in May: 7.1mph

The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).

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Average humidity in May
Santa Rosa, CA

Average humidity in May - Santa Rosa, CA
  • Average humidity in May: 70%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (63%).

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Average rainfall in May
Santa Rosa, CA

Average rainfall in May - Santa Rosa, CA
  • Average rainfall in May: 0.55"

The wettest month (with the highest rainfall) is February (2.64").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in May
Santa Rosa, CA

Average rainfall days in May - Santa Rosa, CA
  • Average rainfall days in May: 5.3 days

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).

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Average daylight in May /
Average sunshine in May
Santa Rosa, CA

Average daylight in May / Average sunshine in May - Santa Rosa, CA
  • Average daylight in May: 14h and 2min

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 May: 10h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in May
Santa Rosa, CA

Average sunshine days in May - Santa Rosa, CA
  • Average sunshine days in May: 23.4 days

The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (17.1 days).

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Average UV index in May
Santa Rosa, CA

Average UV index in May - Santa Rosa, 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).

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Average cloud cover in May
Santa Rosa, CA

Average cloud cover in May - Santa Rosa, CA
  • Average cloud cover in May: 26

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in May
Santa Rosa, CA

Average visibility in May - Santa Rosa, 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).

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Santa Rosa, California, USA

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