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Monthly climate in Jamestown, North Dakota, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Jamestown features a humid continental climate (Dfb).Temperatures typically range between -13 °C (10 °F) and 22 °C (72 °F) through the year, but rarely can drop to -36 °C (-33 °F) or can rise to as high as 38 °C (100 °F).The average annual precipitation amounts to about 627 mm (24.7 inches) and receives 84 rainy days on the 1 mm (0.04 inches) threshold annually.Jamestown enjoys an average of 3044 hours of sunshine throughout the year, and daylight varies from 8 hours 34 minutes to 15 hours 48 minutes per day.

Monthly average temperatures in Jamestown, North Dakota, United States §

The warmest months in Jamestown are June, July and August, with daily mean temperatures ranging from 20 to 22 °C (68 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -13 to -7 °C (10 - 19 °F) throughout the day. On average each year, Jamestown experiences 61 days above 25 °C (77.0 °F) and 166 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Jamestown, North Dakota, 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
(42°F)		 9°C
(48°F)		 20°C
(69°F)		 23°C
(74°F)		 32°C
(90°F)		 38°C
(100°F)		 35°C
(95°F)		 36°C
(97°F)		 32°C
(91°F)		 28°C
(83°F)		 23°C
(73°F)		 12°C
(54°F)
Mean maximum 4°C
(39°F)		 5°C
(41°F)		 13°C
(55°F)		 21°C
(70°F)		 29°C
(84°F)		 31°C
(87°F)		 33°C
(91°F)		 32°C
(90°F)		 31°C
(87°F)		 24°C
(75°F)		 14°C
(57°F)		 8°C
(47°F)
Average high -7°C
(19°F)		 -8°C
(18°F)		 2°C
(35°F)		 9°C
(48°F)		 19°C
(66°F)		 26°C
(78°F)		 27°C
(82°F)		 26°C
(78°F)		 21°C
(70°F)		 11°C
(52°F)		 3°C
(37°F)		 -3°C
(27°F)
Daily mean -11°C
(12°F)		 -13°C
(10°F)		 -3°C
(27°F)		 4°C
(39°F)		 13°C
(55°F)		 20°C
(68°F)		 22°C
(72°F)		 20°C
(68°F)		 15°C
(60°F)		 6°C
(43°F)		 -2°C
(29°F)		 -7°C
(19°F)
Average low -15°C
(5°F)		 -17°C
(1°F)		 -7°C
(19°F)		 -2°C
(29°F)		 7°C
(44°F)		 14°C
(57°F)		 16°C
(62°F)		 14°C
(58°F)		 10°C
(50°F)		 2°C
(35°F)		 -6°C
(21°F)		 -12°C
(11°F)
Mean minimum -31°C
(-24°F)		 -29°C
(-21°F)		 -20°C
(-4°F)		 -11°C
(12°F)		 -1°C
(30°F)		 8°C
(46°F)		 10°C
(51°F)		 8°C
(47°F)		 1°C
(35°F)		 -8°C
(18°F)		 -16°C
(3°F)		 -27°C
(-16°F)
Minimum -36°C
(-33°F)		 -32°C
(-26°F)		 -27°C
(-16°F)		 -19°C
(-2°F)		 -4°C
(25°F)		 5°C
(42°F)		 9°C
(48°F)		 7°C
(44°F)		 -1°C
(30°F)		 -10°C
(14°F)		 -18°C
(-1°F)		 -32°C
(-25°F)

Compare climate in Jamestown with other places

Compare temperature, precipitation, sunshine, UV index in Jamestown, North Dakota, United States with other places around the world.

Monthly average precipitation in Jamestown, North Dakota, United States §

Jamestown usually has the most precipitation in June, July and August, with an average of 8 rainy days and 91 mm (3.6 inches) of precipitation per month.The driest months in Jamestown are January, February and November. On average, 18 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Jamestown, North Dakota, 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) 17 (0.7) 19 (0.8) 25 (1.0) 38 (1.5) 56 (2.2) 83 (3.2) 87 (3.4) 104 (4.1) 71 (2.8) 74 (2.9) 19 (0.7) 35 (1.4)
Average precipitation days (≥ 1 mm) 4 6 5 7 9 9 8 9 8 7 5 7

Monthly sunshine hours in Jamestown, North Dakota, United States §

The sunniest months in Jamestown are June, July and August, when the sun shines an average of 11 hours 40 minutes a day.Least sunny months in Jamestown: January, November and December receive an average of 5 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Jamestown, North Dakota, 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 141 206 250 254 306 360 382 330 259 207 176 167
Mean daily daylight hours 8h 59m 10h 18m 11h 57m 13h 38m 15h 4m 15h 48m 15h 23m 14h 6m 12h 29m 10h 49m 9h 20m 8h 34m

Solar UV radiation in Jamestown, North Dakota, United States §

Jamestown experiences the highest level of ultraviolet (UV) radiation in May, June and July, 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 Jamestown UV Index data.

Average daily maximum UV levels by month for Jamestown, North Dakota, 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 5 8 9 10 9 8 7 5 3 2