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Petaluma May Weather

Averages and records for weather in Petaluma, California in the month of May.

Typical Petaluma May Weather 1991–2020
Average daily high	72.0 °F
Average daily low	47.7 °F
Average monthly precipitation	1.0 inches
Average monthly snow	none
Daily chance of precipitation	12.1%
Daily chance of snow	0%

Petaluma May Weather Records 1893–2024
Highest temperature	101 °F	May 12, 1976
Lowest temperature	27 °F	May 10, 1985
Highest daily low	71 °F	May 15, 2008
Lowest daily high	54 °F	May 14, 1919
Hottest average high temperature	79.1 °F	1984
Coldest average high temperature	65.2 °F	1915
Most daily precipitation	2.3 inches	May 21, 1921
Most monthly precipitation	4.6 inches	1925
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
May 1	70.5	45.9	91	34
May 2	70.7	46.1	91	33
May 3	70.8	46.3	91	34
May 4	70.8	46.5	91	32
May 5	70.9	46.6	96	32
May 6	71.0	46.7	97	34
May 7	71.1	46.7	98	31
May 8	71.2	46.8	92	32
May 9	71.4	46.9	94	31
May 10	71.5	47.1	92	27
May 11	71.6	47.2	92	32
May 12	71.6	47.3	101	36
May 13	71.7	47.4	95	35
May 14	71.7	47.5	95	34
May 15	71.8	47.6	100	34
May 16	71.8	47.7	95	35
May 17	71.9	47.8	99	34
May 18	72.1	47.9	92	34
May 19	72.3	48.0	94	33
May 20	72.5	48.2	96	33
May 21	72.6	48.3	92	34
May 22	72.8	48.4	95	37
May 23	72.9	48.5	97	38
May 24	73.1	48.6	99	34
May 25	73.2	48.8	95	37
May 26	73.5	48.9	94	36
May 27	73.7	49.1	98	38
May 28	74.0	49.3	99	39
May 29	74.2	49.4	101	36
May 30	74.5	49.4	98	34
May 31	74.9	49.4	99	34

Weather Station Details

Years	Station	Coordinates
1893–2024	Petaluma Airport	location