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Monthly climate in John Day, Oregon, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification John Day features a humid continental climate (Dsb).Temperatures typically range between -3 °C (28 °F) and 20 °C (69 °F) through the year, but rarely can drop to -25 °C (-12 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 675 mm (26.6 inches) and receives 124 rainy days on the 1 mm (0.04 inches) threshold annually.John Day enjoys an average of 3147 hours of sunshine throughout the year, and daylight varies from 8 hours 53 minutes to 15 hours 27 minutes per day.

Monthly average temperatures in John Day, Oregon, United States §

The warmest months in John Day are June, July and August, with daily mean temperatures ranging from 15 to 20 °C (59 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to -2 °C (28 - 29 °F) throughout the day. On average each year, John Day experiences 59 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 John Day, Oregon, 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 9°C
(49°F)		 14°C
(57°F)		 17°C
(63°F)		 25°C
(77°F)		 29°C
(84°F)		 38°C
(101°F)		 36°C
(97°F)		 38°C
(100°F)		 35°C
(96°F)		 27°C
(81°F)		 19°C
(67°F)		 15°C
(59°F)
Mean maximum 7°C
(44°F)		 10°C
(50°F)		 14°C
(57°F)		 21°C
(71°F)		 26°C
(78°F)		 29°C
(84°F)		 35°C
(95°F)		 35°C
(95°F)		 32°C
(90°F)		 22°C
(73°F)		 15°C
(60°F)		 9°C
(49°F)
Average high 2°C
(35°F)		 3°C
(37°F)		 7°C
(45°F)		 11°C
(52°F)		 16°C
(62°F)		 22°C
(71°F)		 29°C
(84°F)		 28°C
(82°F)		 22°C
(72°F)		 13°C
(56°F)		 7°C
(44°F)		 2°C
(35°F)
Daily mean -3°C
(28°F)		 -2°C
(29°F)		 2°C
(35°F)		 5°C
(41°F)		 10°C
(50°F)		 15°C
(59°F)		 20°C
(69°F)		 20°C
(68°F)		 14°C
(58°F)		 6°C
(44°F)		 1°C
(35°F)		 -2°C
(28°F)
Average low -6°C
(21°F)		 -6°C
(21°F)		 -3°C
(26°F)		 -1°C
(30°F)		 3°C
(38°F)		 7°C
(44°F)		 11°C
(52°F)		 11°C
(52°F)		 6°C
(43°F)		 0°C
(33°F)		 -3°C
(27°F)		 -6°C
(21°F)
Mean minimum -17°C
(1°F)		 -16°C
(3°F)		 -11°C
(12°F)		 -8°C
(18°F)		 -4°C
(26°F)		 1°C
(33°F)		 5°C
(41°F)		 4°C
(39°F)		 -1°C
(31°F)		 -8°C
(18°F)		 -10°C
(14°F)		 -16°C
(3°F)
Minimum -23°C
(-9°F)		 -25°C
(-12°F)		 -13°C
(8°F)		 -14°C
(8°F)		 -5°C
(23°F)		 -1°C
(31°F)		 1°C
(34°F)		 1°C
(34°F)		 -2°C
(29°F)		 -13°C
(10°F)		 -12°C
(10°F)		 -19°C
(-2°F)

Compare climate in John Day with other places

Compare temperature, precipitation, sunshine, UV index in John Day, Oregon, United States with other places around the world.

Monthly average precipitation in John Day, Oregon, United States §

John Day usually has the most precipitation in February, March and April, with an average of 15 rainy days and 86 mm (3.4 inches) of precipitation per month.The driest months in John Day are July, August and September. On average, 16 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in John Day, Oregon, 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) 70 (2.7) 101 (4.0) 78 (3.1) 80 (3.1) 73 (2.9) 41 (1.6) 3 (0.1) 14 (0.6) 31 (1.2) 56 (2.2) 62 (2.4) 67 (2.6)
Average precipitation days (≥ 1 mm) 13 17 15 13 13 9 0 3 5 9 12 15

Monthly sunshine hours in John Day, Oregon, United States §

The sunniest months in John Day are June, July and August, when the sun shines an average of 12 hours 16 minutes a day.Least sunny months in John Day: January, February and December receive an average of 4 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in John Day, Oregon, 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 117 165 249 275 335 365 406 357 299 244 176 154
Mean daily daylight hours 9h 16m 10h 27m 11h 57m 13h 30m 14h 48m 15h 27m 15h 6m 13h 55m 12h 27m 10h 55m 9h 34m 8h 53m

Solar UV radiation in John Day, Oregon, United States §

John Day experiences the highest level of ultraviolet (UV) radiation in May, June and August, 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 John Day UV Index data.

Average daily maximum UV levels by month for John Day, Oregon, 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 6 9 10 11 10 10 8 6 4 2