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Climate in Riverside (California)


Average weather, temperature, rainfall, sunshine hours

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Riverside, where it's located


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Climate chart - Riverside
The climate of Riverside is arid subtropical, with very mild, relatively rainy winters and very hot, sunny summers.
Precipitation is scarce, although in winter there may be periods of bad weather.
The city is located in California, at 250 meters (820 ft) above sea level, 90 km (55 mi) east of Los Angeles, and south-east of San Bernardino, in an area far enough from the ocean to be very hot in summer.
In winter, however, sometimes it can get cold at night, although in general the temperature only reaches the freezing mark on the coldest nights of the year. In January 2007 it dropped to -4.4 °C (24 °F). Due to its location in an area surrounded by mountains, the city is also subject to air stagnation and therefore pollution.
In summer, the temperature can exceed 40 °C (104 °F) on the hottest days, and sometimes it can reach 44/45 °C (111/113 °F). In July 2018, it reached 47.8 °C (118 °F), while in September 2020 it reached 47.2 °C (117 °C).

Riverside

Best Time


To visit Riverside, you can choose the periods from mid-March to mid-April and from mid-October to mid-November. In winter, the weather is often mild and sunny, but sometimes it can be cold at night, and it can also rain.

Riverside - Climate data


In Riverside, the average temperature of the coldest month (December) is of 12.7 °C, that of the warmest month (August) is of 26.6 °C. Here are the average temperatures.
Riverside - Average temperatures (1991-2020)
Temperatures (°C)
MonthMinMaxMean
January6.419.813.1
February7.119.913.5
March8.322.315.3
April1024.417.2
May12.926.619.8
June15.230.422.8
July17.734.125.9
August18.234.926.6
September16.632.924.8
October12.928.220.5
November8.623.616.1
December619.312.7
Year11.726.419

Precipitation amounts to 240 millimeters per year: it is therefore scarce. It ranges from 0 millimeters in the driest months (June, August) to 60 millimeters in the wettest ones (January, February) Here is the average precipitation.
Riverside - Average precipitation
MonthRain (mm)Days
January605
February607
March305
April154
May52
June00
July51
August00
September50
October102
November154
December405
Year24035

Riverside - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)


January is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of 13.1 °C, with a minimum of 6.4 °C and a maximum of 19.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 1 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 28.5 °C.
Rain iconPrecipitation amounts to 60 mm, distributed over 5 days.
The day lasts on average 10 hours and 10 minutes.
The average humidity is 50%.
The average wind speed is of 7.9 kph.


February is generally a mild month. The average temperature is of 13.5 °C, with a minimum of 7.1 °C and a maximum of 19.9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 1.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 29.5 °C.
Rain iconPrecipitation amounts to 60 mm, distributed over 7 days.
The day lasts on average 11 hours and 0 minutes.
The average humidity is 55%.
The average wind speed is of 7.5 kph.


March is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of 15.3 °C, with a minimum of 8.3 °C and a maximum of 22.3 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 3 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 31 °C.
Rain iconPrecipitation amounts to 30 mm, distributed over 5 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 57%.
The average wind speed is of 7.6 kph.


April is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of 17.2 °C, with a minimum of 10 °C and a maximum of 24.4 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 34.5 °C.
Rain iconPrecipitation amounts to 15 mm, distributed over 4 days.
The day lasts on average 13 hours and 5 minutes.
The average humidity is 55%.
The average wind speed is of 8.3 kph.


May is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of 19.8 °C, with a minimum of 12.9 °C and a maximum of 26.6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 8.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 36 °C.
Rain iconPrecipitation amounts to only 5 mm, distributed over 2 days.
The day lasts on average 14 hours and 0 minutes.
The average humidity is 57%.
The average wind speed is of 8.8 kph.


June is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of 22.8 °C, with a minimum of 15.2 °C and a maximum of 30.4 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 11.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 38 °C.
Rain iconPrecipitation amounts to only 0 mm, so on average it never rains in the whole month.
The day lasts on average 14 hours and 25 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average humidity is 56%.
The average wind speed is of 9.1 kph.


July is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of 25.9 °C, with a minimum of 17.7 °C and a maximum of 34.1 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 14 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 40.5 °C.
Rain iconPrecipitation amounts to only 5 mm, and all occurs in one day.
The day lasts on average 14 hours and 5 minutes. So the days are long.
The average humidity is 52%.
The average wind speed is of 8.8 kph.


August, the hottest month of the year, is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of 26.6 °C, with a minimum of 18.2 °C and a maximum of 34.9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 14.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 41 °C.
Rain iconPrecipitation amounts to only 0 mm, so on average it never rains in the whole month.
The day lasts on average 13 hours and 20 minutes.
The average humidity is 50%.
The average wind speed is of 8.1 kph.


September is generally a warm to hot month. However, there are remarkable differences between night and day. The average temperature is of 24.8 °C, with a minimum of 16.6 °C and a maximum of 32.9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 12 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 41.5 °C.
Rain iconPrecipitation amounts to only 5 mm, distributed over 0 days.
The day lasts on average 12 hours and 20 minutes.
The average humidity is 51%.
The average wind speed is of 7.2 kph.


October is generally a warm month. However, there are remarkable differences between night and day. The average temperature is of 20.5 °C, with a minimum of 12.9 °C and a maximum of 28.2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 8.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 37.5 °C.
Rain iconPrecipitation amounts to 10 mm, distributed over 2 days.
The day lasts on average 11 hours and 20 minutes.
The average humidity is 51%.
The average wind speed is of 7.1 kph.


November is generally a very mild month. However, there are remarkable differences between night and day. The average temperature is of 16.1 °C, with a minimum of 8.6 °C and a maximum of 23.6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 3 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 32.5 °C.
Rain iconPrecipitation amounts to 15 mm, distributed over 4 days.
The day lasts on average 10 hours and 25 minutes.
The average humidity is 49%.
The average wind speed is of 7.1 kph.


December, the coldest month of the year, is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of 12.7 °C, with a minimum of 6 °C and a maximum of 19.3 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 0.5 °C.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 27.5 °C.
Rain iconPrecipitation amounts to 40 mm, distributed over 5 days.
The day lasts on average 9 hours and 55 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 50%.
The average wind speed is of 7.8 kph.

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