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Monthly climate in Grangeville, Idaho, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Grangeville features a oceanic climate (Cfb). Temperatures typically range between -1 °C (31 °F) and 22 °C (71 °F) through the year, but rarely can drop to -21 °C (-6 °F) or can rise to as high as 40 °C (105 °F). The average annual precipitation amounts to about 899 mm (35.4 inches) and receives 140 rainy days on the 1 mm (0.04 inches) threshold annually. Grangeville enjoys an average of 2970 hours of sunshine throughout the year, and daylight varies from 8 hours 42 minutes to 15 hours 40 minutes per day.

Monthly average temperatures in Grangeville, Idaho, United States §

The warmest months in Grangeville are June, July and August, with daily mean temperatures ranging from 16 to 22 °C (61 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 0 °C (31 - 32 °F) throughout the day. On average each year, Grangeville experiences 59 days above 25 °C (77.0 °F) and 121 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grangeville, 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 10°C
(51°F)		 14°C
(58°F)		 19°C
(67°F)		 28°C
(82°F)		 30°C
(86°F)		 40°C
(105°F)		 39°C
(102°F)		 40°C
(104°F)		 35°C
(95°F)		 26°C
(80°F)		 18°C
(64°F)		 16°C
(61°F)
Mean maximum 8°C
(47°F)		 12°C
(54°F)		 17°C
(63°F)		 23°C
(74°F)		 27°C
(81°F)		 29°C
(84°F)		 35°C
(95°F)		 37°C
(99°F)		 32°C
(90°F)		 23°C
(73°F)		 15°C
(60°F)		 11°C
(52°F)
Average high 3°C
(37°F)		 3°C
(38°F)		 9°C
(48°F)		 13°C
(55°F)		 18°C
(64°F)		 22°C
(72°F)		 29°C
(84°F)		 28°C
(84°F)		 22°C
(73°F)		 14°C
(57°F)		 7°C
(46°F)		 3°C
(37°F)
Daily mean -1°C
(31°F)		 -1°C
(31°F)		 3°C
(38°F)		 7°C
(45°F)		 12°C
(53°F)		 16°C
(61°F)		 22°C
(71°F)		 21°C
(70°F)		 15°C
(60°F)		 8°C
(46°F)		 3°C
(38°F)		 -0°C
(32°F)
Average low -4°C
(25°F)		 -4°C
(24°F)		 -1°C
(30°F)		 1°C
(35°F)		 6°C
(43°F)		 10°C
(50°F)		 13°C
(56°F)		 13°C
(56°F)		 9°C
(48°F)		 3°C
(37°F)		 -0°C
(32°F)		 -3°C
(26°F)
Mean minimum -14°C
(7°F)		 -14°C
(7°F)		 -9°C
(16°F)		 -5°C
(22°F)		 -1°C
(31°F)		 4°C
(39°F)		 8°C
(46°F)		 7°C
(45°F)		 1°C
(35°F)		 -6°C
(21°F)		 -7°C
(19°F)		 -12°C
(11°F)
Minimum -19°C
(-2°F)		 -21°C
(-6°F)		 -14°C
(8°F)		 -11°C
(12°F)		 -3°C
(27°F)		 3°C
(37°F)		 6°C
(43°F)		 5°C
(41°F)		 -2°C
(28°F)		 -15°C
(5°F)		 -10°C
(13°F)		 -21°C
(-5°F)

Compare climate in Grangeville with other places

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

Monthly average precipitation in Grangeville, Idaho, United States §

Grangeville usually has the most precipitation in February, April and May, with an average of 16 rainy days and 111 mm (4.4 inches) of precipitation per month. The driest months in Grangeville are July, August and September. On average, 27 mm (1.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grangeville, 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) 65 (2.6) 133 (5.2) 90 (3.5) 106 (4.2) 93 (3.6) 83 (3.3) 7 (0.3) 30 (1.2) 45 (1.8) 79 (3.1) 82 (3.2) 86 (3.4)
Average precipitation days (≥ 1 mm) 13 20 17 15 13 10 2 3 6 11 14 16

Monthly sunshine hours in Grangeville, Idaho, United States §

The sunniest months in Grangeville are June, July and August, when the sun shines an average of 12 hours 2 minutes a day. Least sunny months in Grangeville: January, February and December receive an average of 4 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grangeville, 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 108 131 225 264 320 345 406 355 290 222 172 128
Mean daily daylight hours 9h 6m 10h 22m 11h 57m 13h 35m 14h 58m 15h 40m 15h 16m 14h 2m 12h 28m 10h 51m 9h 26m 8h 42m

Solar UV radiation in Grangeville, Idaho, United States §

Grangeville experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Grangeville UV Index data.

Average daily maximum UV levels by month for Grangeville, 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 4 7 8 9 10 10 9 8 5 3 2

Detailed Monthly Weather Insights for Grangeville, Idaho, United States

Discover in-depth weather details for every month in Grangeville. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Grangeville's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.