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Monthly climate in Saint Ignatius, Montana, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Saint Ignatius features a humid continental climate (Dfb).Temperatures typically range between -7 °C (20 °F) and 19 °C (67 °F) through the year, but rarely can drop to -31 °C (-24 °F) or can rise to as high as 36 °C (97 °F).The average annual precipitation amounts to about 889 mm (35.0 inches) and receives 158 rainy days on the 1 mm (0.04 inches) threshold annually.Saint Ignatius enjoys an average of 2953 hours of sunshine throughout the year, and daylight varies from 8 hours 31 minutes to 15 hours 51 minutes per day.

Monthly average temperatures in Saint Ignatius, Montana, United States §

The warmest months in Saint Ignatius are June, July and August, with daily mean temperatures ranging from 14 to 19 °C (58 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -3 °C (20 - 26 °F) throughout the day. On average each year, Saint Ignatius experiences 43 days above 25 °C (77.0 °F) and 168 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Saint Ignatius, 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)		 10°C
(51°F)		 17°C
(63°F)		 23°C
(74°F)		 28°C
(83°F)		 35°C
(96°F)		 36°C
(96°F)		 36°C
(97°F)		 31°C
(89°F)		 25°C
(78°F)		 14°C
(57°F)		 12°C
(55°F)
Mean maximum 4°C
(40°F)		 7°C
(45°F)		 12°C
(54°F)		 19°C
(66°F)		 24°C
(76°F)		 27°C
(80°F)		 33°C
(91°F)		 34°C
(93°F)		 30°C
(86°F)		 21°C
(69°F)		 11°C
(53°F)		 8°C
(47°F)
Average high -1°C
(30°F)		 -2°C
(28°F)		 4°C
(40°F)		 9°C
(48°F)		 15°C
(59°F)		 20°C
(68°F)		 27°C
(80°F)		 26°C
(79°F)		 19°C
(67°F)		 10°C
(50°F)		 3°C
(38°F)		 -0°C
(32°F)
Daily mean -5°C
(23°F)		 -7°C
(20°F)		 -0°C
(31°F)		 3°C
(38°F)		 9°C
(49°F)		 14°C
(58°F)		 19°C
(67°F)		 18°C
(65°F)		 13°C
(55°F)		 5°C
(41°F)		 -0°C
(32°F)		 -3°C
(26°F)
Average low -8°C
(17°F)		 -11°C
(13°F)		 -5°C
(24°F)		 -2°C
(30°F)		 3°C
(39°F)		 8°C
(46°F)		 11°C
(52°F)		 11°C
(51°F)		 7°C
(44°F)		 -0°C
(32°F)		 -4°C
(26°F)		 -7°C
(20°F)
Mean minimum -20°C
(-3°F)		 -25°C
(-13°F)		 -16°C
(4°F)		 -8°C
(18°F)		 -3°C
(27°F)		 1°C
(34°F)		 5°C
(42°F)		 5°C
(41°F)		 -1°C
(30°F)		 -10°C
(14°F)		 -12°C
(10°F)		 -16°C
(3°F)
Minimum -27°C
(-16°F)		 -31°C
(-24°F)		 -26°C
(-14°F)		 -10°C
(14°F)		 -5°C
(23°F)		 -0°C
(32°F)		 2°C
(36°F)		 4°C
(40°F)		 -3°C
(27°F)		 -21°C
(-5°F)		 -16°C
(3°F)		 -24°C
(-12°F)

Compare climate in Saint Ignatius with other places

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

Monthly average precipitation in Saint Ignatius, Montana, United States §

Saint Ignatius usually has the most precipitation in February, April and May, with an average of 17 rainy days and 103 mm (4.1 inches) of precipitation per month.The driest months in Saint Ignatius are July, August and September. On average, 32 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Saint Ignatius, 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) 63 (2.5) 114 (4.5) 70 (2.8) 97 (3.8) 97 (3.8) 84 (3.3) 21 (0.8) 31 (1.2) 45 (1.8) 88 (3.5) 94 (3.7) 84 (3.3)
Average precipitation days (≥ 1 mm) 13 19 17 17 16 13 4 6 8 13 15 17

Monthly sunshine hours in Saint Ignatius, Montana, United States §

The sunniest months in Saint Ignatius are June, July and August, when the sun shines an average of 11 hours 59 minutes a day.Least sunny months in Saint Ignatius: January, February and December receive an average of 4 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Saint Ignatius, 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 113 139 237 263 309 345 405 352 276 219 158 132
Mean daily daylight hours 8h 57m 10h 17m 11h 57m 13h 39m 15h 7m 15h 51m 15h 27m 14h 8m 12h 29m 10h 47m 9h 17m 8h 31m

Solar UV radiation in Saint Ignatius, Montana, United States §

Saint Ignatius 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 Saint Ignatius UV Index data.

Average daily maximum UV levels by month for Saint Ignatius, 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 4 6 7 9 10 10 9 8 5 3 2