Weather in Riverside County

Calculated from weather data of French Valley Airport (KF70) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	66.0	64.0	60.0	68.0	67.0	67.0
February	66.0	62.0	62.0	70.0	68.0	70.0
March	68.0	65.0	62.0	74.0	67.0	65.0
April	75.0		75.0	76.0	76.0	71.0
May	76.0		71.0	79.0	77.0	82.0
June	85.0		77.0	90.0	88.0	83.0
July	92.0		94.0	90.0	92.0	91.0
August	93.0		92.0	95.0	92.0	95.0
September	89.0		82.0	92.0	89.0	95.0
October	82.0		83.0	80.0	78.0	86.0
November	75.0		74.0	68.0	79.0	75.0
December	66.0		69.0	60.0	62.0	69.0
Average	76.0	64.0	75.0	79.0	78.0	79.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	41.0	41	40	42	40	39
February	41.0	45	38	40	40	41
March	45.0	45	43	45	42	44
April	49.0		47	49	48	51
May	53.0		52	53	52	55
June	57.0		55	58	57	56
July	64.0		63	63	65	61
August	65.0		65	67	65	65
September	62.0		60	67	61	61
October	54.0		55	55	51	56
November	46.0		46	42	47	44
December	41.0		43	39	41	39
Average	50.0	44.0	51.0	52.0	51.0	51.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
86 °F or warmer	0	79	107	103	116
77 °F or warmer	0	151	187	184	191
68 °F or warmer	20	231	269	267	273
32 °F or colder	1	3	1	0	2

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	2.4	6	14	0	0	0
February	2.5	14	4	3	0	0
March	3.7	10	15	2	5	0
April	0.2		0	0	1	0
May	0.3		2	0	0	0
June	0.0		0	0	0	0
July	0.1		0	0	1	0
August	0.2		2	0	0	0
September	0.3		0	2	0	0
October	0.4		1	0	3	0
November	0.6		1	4	0	0
December	2.4		1	7	11	0
Average	1.9	9.7	3.2	1.1	1.6

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	4.1	4	5	4	4	4
February	4.7	4	6	6	4	4
March	5.1	6	5	6	5	4
April	5.8		5	6	6	5
May	6.1		6	6	6	5
June	5.7		5	6	5	5
July	5.9		6	6	6	6
August	5.9		6	6	6	6
September	5.0		5	5	5	1
October	4.6		5	5	5	2
November	4.3		5	5	4	3
December	3.5		3	3	4	3
Average	5.1	4.6	5.1	5.4	5.1	4.0

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	SW	SW	N	NW	W
February	SW	SW	NW	SW	SW
March	SW	SW	SW	SW	SW
April		SW	SW	SW	SW
May		SW	SW	SW	SW
June		SW	SW	SW	SW
July		SW	SW	SW	SW
August		SW	SW	SW	SW
September		SW	SW	SW	SW
October		SW	SW	SW	SW
November		SW	SW	SW	SW
December		NW	SW	SW	SE

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Riverside County weather Q&A

What is the warmest month in Riverside County?

The warmest month is August with an average temperature of 93 °F over the past years.

What is the coldest month in Riverside County?

The coldest month is February with an average daytime temperature of 66 °F in the past few years.

Which month is the wettest in Riverside County?

Chance of precipitation is the highest in March with a probability of around 3.8 %.

Which month is the driest in Riverside County?

The least rainfall and snow can be expected in June. The probability is about 0.0 %.