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Monthly climate in Riverside, Idaho, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Riverside features a cold semi-arid climate (BSk).Temperatures typically range between -3 °C (27 °F) and 25 °C (78 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 39 °C (102 °F).The average annual precipitation amounts to about 334 mm (13.1 inches) and receives 76 rainy days on the 1 mm (0.04 inches) threshold annually.Riverside enjoys an average of 3219 hours of sunshine throughout the year, and daylight varies from 9 hours 1 minutes to 15 hours 18 minutes per day.

Monthly average temperatures in Riverside, Idaho, United States §

The warmest months in Riverside are June, July and August, with daily mean temperatures ranging from 20 to 25 °C (69 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to -1 °C (27 - 31 °F) throughout the day. On average each year, Riverside experiences 93 days above 25 °C (77.0 °F) and 124 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Riverside, Idaho, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 14°C
(57°F)		 15°C
(58°F)		 23°C
(74°F)		 28°C
(83°F)		 34°C
(94°F)		 37°C
(100°F)		 38°C
(101°F)		 39°C
(102°F)		 38°C
(100°F)		 28°C
(82°F)		 22°C
(72°F)		 13°C
(56°F)
Mean maximum 8°C
(46°F)		 11°C
(51°F)		 20°C
(68°F)		 25°C
(77°F)		 31°C
(87°F)		 31°C
(89°F)		 37°C
(99°F)		 37°C
(99°F)		 35°C
(96°F)		 25°C
(77°F)		 17°C
(63°F)		 9°C
(49°F)
Average high 1°C
(33°F)		 3°C
(38°F)		 11°C
(52°F)		 15°C
(59°F)		 21°C
(70°F)		 27°C
(82°F)		 33°C
(92°F)		 32°C
(89°F)		 26°C
(78°F)		 15°C
(59°F)		 9°C
(48°F)		 2°C
(36°F)
Daily mean -3°C
(27°F)		 -1°C
(31°F)		 5°C
(41°F)		 9°C
(48°F)		 14°C
(58°F)		 20°C
(69°F)		 25°C
(78°F)		 24°C
(75°F)		 18°C
(64°F)		 8°C
(48°F)		 3°C
(38°F)		 -2°C
(29°F)
Average low -6°C
(21°F)		 -5°C
(24°F)		 -0°C
(32°F)		 3°C
(37°F)		 7°C
(46°F)		 12°C
(55°F)		 16°C
(62°F)		 15°C
(59°F)		 10°C
(50°F)		 3°C
(37°F)		 -2°C
(29°F)		 -5°C
(23°F)
Mean minimum -17°C
(2°F)		 -14°C
(8°F)		 -7°C
(19°F)		 -4°C
(25°F)		 0°C
(33°F)		 5°C
(41°F)		 10°C
(51°F)		 9°C
(49°F)		 2°C
(36°F)		 -7°C
(20°F)		 -8°C
(18°F)		 -11°C
(12°F)
Minimum -29°C
(-20°F)		 -15°C
(5°F)		 -13°C
(8°F)		 -6°C
(21°F)		 -2°C
(29°F)		 3°C
(38°F)		 8°C
(46°F)		 5°C
(41°F)		 1°C
(34°F)		 -15°C
(4°F)		 -11°C
(12°F)		 -14°C
(8°F)

Compare climate in Riverside with other places

Compare temperature, precipitation, sunshine, UV index in Riverside, Idaho, United States with other places around the world.

Monthly average precipitation in Riverside, Idaho, United States §

Riverside usually has the most precipitation in February, March and May, with an average of 9 rainy days and 41 mm (1.6 inches) of precipitation per month.The driest months in Riverside are June, July and August. On average, 13 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Riverside, Idaho, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 32 (1.3) 40 (1.6) 40 (1.6) 37 (1.4) 43 (1.7) 20 (0.8) 7 (0.3) 11 (0.4) 20 (0.8) 29 (1.1) 22 (0.9) 33 (1.3)
Average precipitation days (≥ 1 mm) 8 10 9 9 9 4 1 3 3 6 5 9

Monthly sunshine hours in Riverside, Idaho, United States §

The sunniest months in Riverside are June, July and August, when the sun shines an average of 12 hours 13 minutes a day.Least sunny months in Riverside: January, February and December receive an average of 5 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Riverside, Idaho, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 123 176 259 277 332 373 395 355 303 259 200 161
Mean daily daylight hours 9h 23m 10h 31m 11h 58m 13h 26m 14h 41m 15h 18m 14h 58m 13h 51m 12h 26m 10h 58m 9h 40m 9h 1m

Solar UV radiation in Riverside, Idaho, United States §

Riverside experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Riverside UV Index data.

Average daily maximum UV levels by month for Riverside, Idaho, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 7 8 10 11 11 10 9 6 4 3