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Monthly climate in Fairfield, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Fairfield features a cold semi-arid climate (BSk).Temperatures typically range between -7 °C (19 °F) and 21 °C (71 °F) through the year, but rarely can drop to -38 °C (-37 °F) or can rise to as high as 39 °C (102 °F).The average annual precipitation amounts to about 429 mm (16.9 inches) and receives 78 rainy days on the 1 mm (0.04 inches) threshold annually.Fairfield enjoys an average of 3145 hours of sunshine throughout the year, and daylight varies from 8 hours 28 minutes to 15 hours 54 minutes per day.

Monthly average temperatures in Fairfield, Montana, United States §

The warmest months in Fairfield are June, July and August, with daily mean temperatures ranging from 17 to 21 °C (63 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -2 °C (19 - 28 °F) throughout the day. On average each year, Fairfield experiences 66 days above 25 °C (77.0 °F) and 145 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Fairfield, Montana, 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 11°C
(52°F)		 17°C
(63°F)		 22°C
(71°F)		 28°C
(82°F)		 30°C
(86°F)		 38°C
(100°F)		 37°C
(98°F)		 39°C
(102°F)		 35°C
(94°F)		 30°C
(85°F)		 21°C
(69°F)		 20°C
(67°F)
Mean maximum 9°C
(49°F)		 12°C
(53°F)		 17°C
(63°F)		 24°C
(75°F)		 28°C
(83°F)		 30°C
(86°F)		 36°C
(97°F)		 36°C
(97°F)		 33°C
(91°F)		 25°C
(78°F)		 17°C
(63°F)		 13°C
(56°F)
Average high 1°C
(34°F)		 -2°C
(28°F)		 7°C
(44°F)		 11°C
(53°F)		 18°C
(65°F)		 24°C
(75°F)		 30°C
(86°F)		 28°C
(83°F)		 22°C
(72°F)		 13°C
(55°F)		 7°C
(45°F)		 2°C
(37°F)
Daily mean -4°C
(25°F)		 -7°C
(19°F)		 0°C
(33°F)		 5°C
(41°F)		 12°C
(53°F)		 17°C
(63°F)		 21°C
(71°F)		 20°C
(68°F)		 14°C
(58°F)		 6°C
(44°F)		 2°C
(36°F)		 -2°C
(28°F)
Average low -9°C
(17°F)		 -12°C
(10°F)		 -5°C
(23°F)		 -1°C
(31°F)		 5°C
(42°F)		 10°C
(50°F)		 12°C
(54°F)		 12°C
(54°F)		 8°C
(46°F)		 1°C
(34°F)		 -3°C
(28°F)		 -6°C
(22°F)
Mean minimum -27°C
(-16°F)		 -28°C
(-17°F)		 -18°C
(0°F)		 -9°C
(16°F)		 -1°C
(30°F)		 5°C
(41°F)		 7°C
(45°F)		 6°C
(44°F)		 -0°C
(32°F)		 -8°C
(18°F)		 -13°C
(9°F)		 -19°C
(-1°F)
Minimum -33°C
(-26°F)		 -38°C
(-37°F)		 -32°C
(-26°F)		 -15°C
(5°F)		 -5°C
(23°F)		 4°C
(40°F)		 4°C
(40°F)		 4°C
(39°F)		 -3°C
(27°F)		 -17°C
(2°F)		 -17°C
(1°F)		 -30°C
(-21°F)

Compare climate in Fairfield with other places

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

Monthly average precipitation in Fairfield, Montana, United States §

Fairfield usually has the most precipitation in April, May and June, with an average of 9 rainy days and 70 mm (2.7 inches) of precipitation per month.The driest months in Fairfield are January, July and August. On average, 14 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Fairfield, Montana, 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) 13 (0.5) 35 (1.4) 25 (1.0) 54 (2.1) 75 (2.9) 80 (3.1) 9 (0.4) 20 (0.8) 38 (1.5) 33 (1.3) 24 (0.9) 23 (0.9)
Average precipitation days (≥ 1 mm) 3 10 6 11 9 9 2 3 6 7 6 6

Monthly sunshine hours in Fairfield, Montana, United States §

The sunniest months in Fairfield are June, July and August, when the sun shines an average of 12 hours 3 minutes a day.Least sunny months in Fairfield: January, February and December receive an average of 5 hours 29 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Fairfield, Montana, 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 152 177 263 276 309 360 402 347 273 235 177 170
Mean daily daylight hours 8h 55m 10h 16m 11h 57m 13h 40m 15h 9m 15h 54m 15h 29m 14h 9m 12h 29m 10h 47m 9h 15m 8h 28m

Solar UV radiation in Fairfield, Montana, United States §

Fairfield experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, February 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 Fairfield UV Index data.

Average daily maximum UV levels by month for Fairfield, Montana, 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) 2 3 5 7 9 10 9 9 7 5 3 2