nomadseason

Monthly climate in Dillon, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Dillon features a cold semi-arid climate (BSk).Temperatures typically range between -9 °C (16 °F) and 19 °C (66 °F) through the year, but rarely can drop to -34 °C (-29 °F) or can rise to as high as 33 °C (92 °F).The average annual precipitation amounts to about 457 mm (18.0 inches) and receives 110 rainy days on the 1 mm (0.04 inches) threshold annually.Dillon enjoys an average of 3257 hours of sunshine throughout the year, and daylight varies from 8 hours 47 minutes to 15 hours 34 minutes per day.

Monthly average temperatures in Dillon, Montana, United States §

The warmest months in Dillon are June, July and August, with daily mean temperatures ranging from 14 to 19 °C (57 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -9 °C (16 - 17 °F) throughout the day. On average each year, Dillon experiences 47 days above 25 °C (77.0 °F) and 195 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dillon, 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 5°C
(41°F)		 6°C
(43°F)		 13°C
(56°F)		 19°C
(67°F)		 26°C
(79°F)		 32°C
(90°F)		 33°C
(92°F)		 33°C
(92°F)		 33°C
(91°F)		 24°C
(76°F)		 17°C
(63°F)		 11°C
(52°F)
Mean maximum 2°C
(36°F)		 5°C
(41°F)		 10°C
(50°F)		 17°C
(63°F)		 23°C
(73°F)		 25°C
(78°F)		 31°C
(88°F)		 31°C
(89°F)		 30°C
(86°F)		 19°C
(66°F)		 11°C
(52°F)		 5°C
(41°F)
Average high -5°C
(24°F)		 -4°C
(25°F)		 2°C
(37°F)		 7°C
(46°F)		 14°C
(57°F)		 20°C
(69°F)		 27°C
(81°F)		 26°C
(79°F)		 20°C
(68°F)		 9°C
(48°F)		 3°C
(37°F)		 -3°C
(26°F)
Daily mean -9°C
(16°F)		 -9°C
(16°F)		 -3°C
(27°F)		 1°C
(35°F)		 7°C
(46°F)		 14°C
(57°F)		 19°C
(66°F)		 17°C
(64°F)		 12°C
(54°F)		 2°C
(36°F)		 -3°C
(27°F)		 -9°C
(17°F)
Average low -14°C
(8°F)		 -13°C
(8°F)		 -8°C
(17°F)		 -4°C
(25°F)		 1°C
(35°F)		 6°C
(44°F)		 10°C
(50°F)		 9°C
(49°F)		 5°C
(40°F)		 -4°C
(26°F)		 -8°C
(18°F)		 -14°C
(8°F)
Mean minimum -26°C
(-15°F)		 -27°C
(-16°F)		 -20°C
(-4°F)		 -14°C
(8°F)		 -7°C
(20°F)		 -1°C
(30°F)		 4°C
(40°F)		 5°C
(41°F)		 -3°C
(26°F)		 -16°C
(4°F)		 -17°C
(1°F)		 -25°C
(-12°F)
Minimum -30°C
(-22°F)		 -34°C
(-29°F)		 -31°C
(-23°F)		 -20°C
(-3°F)		 -11°C
(13°F)		 -5°C
(23°F)		 1°C
(33°F)		 3°C
(37°F)		 -5°C
(24°F)		 -27°C
(-16°F)		 -23°C
(-9°F)		 -27°C
(-16°F)

Compare climate in Dillon with other places

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

Monthly average precipitation in Dillon, Montana, United States §

Dillon usually has the most precipitation in April, May and June, with an average of 13 rainy days and 64 mm (2.5 inches) of precipitation per month.The driest months in Dillon are January, July and November. On average, 22 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dillon, 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) 19 (0.7) 44 (1.7) 31 (1.2) 47 (1.8) 77 (3.0) 67 (2.6) 23 (0.9) 25 (1.0) 35 (1.4) 39 (1.5) 24 (1.0) 25 (1.0)
Average precipitation days (≥ 1 mm) 6 12 8 12 16 11 8 6 6 9 8 8

Monthly sunshine hours in Dillon, Montana, United States §

The sunniest months in Dillon are June, July and August, when the sun shines an average of 11 hours 58 minutes a day.Least sunny months in Dillon: January, February and December receive an average of 5 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Dillon, 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 147 184 275 295 324 353 396 351 290 246 202 188
Mean daily daylight hours 9h 11m 10h 24m 11h 57m 13h 32m 14h 53m 15h 34m 15h 11m 13h 59m 12h 27m 10h 53m 9h 30m 8h 47m

Solar UV radiation in Dillon, Montana, United States §

Dillon experiences the highest level of ultraviolet (UV) radiation in April, June and July, 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 Low / 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 Dillon UV Index data.

Average daily maximum UV levels by month for Dillon, 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) 3 5 7 10 10 11 11 10 8 6 4 2