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Monthly climate in Troy, Idaho, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Troy features a warm-summer Mediterranean climate (Csb).Temperatures typically range between -1 °C (31 °F) and 23 °C (73 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 43 °C (109 °F).The average annual precipitation amounts to about 745 mm (29.3 inches) and receives 120 rainy days on the 1 mm (0.04 inches) threshold annually.Troy enjoys an average of 2955 hours of sunshine throughout the year, and daylight varies from 8 hours 35 minutes to 15 hours 46 minutes per day.

Monthly average temperatures in Troy, Idaho, United States §

The warmest months in Troy are June, July and August, with daily mean temperatures ranging from 18 to 23 °C (64 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 0 °C (31 - 32 °F) throughout the day. On average each year, Troy experiences 67 days above 25 °C (77.0 °F) and 108 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Troy, Idaho, 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 10°C
(50°F)		 14°C
(58°F)		 19°C
(66°F)		 28°C
(83°F)		 31°C
(88°F)		 43°C
(109°F)		 41°C
(105°F)		 39°C
(103°F)		 35°C
(95°F)		 27°C
(82°F)		 17°C
(63°F)		 15°C
(60°F)
Mean maximum 7°C
(46°F)		 11°C
(52°F)		 16°C
(62°F)		 22°C
(72°F)		 28°C
(82°F)		 31°C
(88°F)		 37°C
(98°F)		 38°C
(100°F)		 33°C
(91°F)		 23°C
(73°F)		 15°C
(59°F)		 9°C
(49°F)
Average high 2°C
(36°F)		 3°C
(38°F)		 9°C
(48°F)		 13°C
(56°F)		 19°C
(66°F)		 23°C
(74°F)		 30°C
(86°F)		 29°C
(85°F)		 23°C
(74°F)		 14°C
(57°F)		 7°C
(45°F)		 2°C
(36°F)
Daily mean -1°C
(31°F)		 -0°C
(31°F)		 4°C
(39°F)		 8°C
(47°F)		 13°C
(56°F)		 18°C
(64°F)		 23°C
(73°F)		 22°C
(72°F)		 16°C
(61°F)		 8°C
(47°F)		 3°C
(38°F)		 -0°C
(32°F)
Average low -3°C
(26°F)		 -4°C
(25°F)		 -1°C
(31°F)		 3°C
(37°F)		 7°C
(46°F)		 11°C
(52°F)		 14°C
(58°F)		 14°C
(58°F)		 10°C
(50°F)		 3°C
(38°F)		 0°C
(33°F)		 -3°C
(27°F)
Mean minimum -13°C
(10°F)		 -15°C
(6°F)		 -9°C
(16°F)		 -3°C
(27°F)		 1°C
(34°F)		 5°C
(41°F)		 9°C
(48°F)		 8°C
(46°F)		 3°C
(38°F)		 -6°C
(21°F)		 -6°C
(21°F)		 -12°C
(11°F)
Minimum -19°C
(-2°F)		 -22°C
(-7°F)		 -15°C
(6°F)		 -5°C
(23°F)		 -1°C
(30°F)		 4°C
(39°F)		 7°C
(44°F)		 5°C
(42°F)		 2°C
(35°F)		 -15°C
(5°F)		 -9°C
(16°F)		 -20°C
(-3°F)

Compare climate in Troy with other places

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

Monthly average precipitation in Troy, Idaho, United States §

Troy usually has the most precipitation in February, November and December, with an average of 15 rainy days and 102 mm (4.0 inches) of precipitation per month.The driest months in Troy are July, August and September. On average, 15 mm (0.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Troy, Idaho, 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) 77 (3.0) 117 (4.6) 78 (3.1) 69 (2.7) 62 (2.5) 33 (1.3) 4 (0.2) 12 (0.5) 29 (1.1) 75 (2.9) 92 (3.6) 96 (3.8)
Average precipitation days (≥ 1 mm) 13 18 13 13 10 6 0 2 5 11 13 16

Monthly sunshine hours in Troy, Idaho, United States §

The sunniest months in Troy are June, July and August, when the sun shines an average of 12 hours 8 minutes a day.Least sunny months in Troy: January, February and December receive an average of 3 hours 48 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Troy, Idaho, 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 101 133 217 267 331 353 410 353 285 229 159 111
Mean daily daylight hours 9h 1m 10h 19m 11h 57m 13h 37m 15h 3m 15h 46m 15h 22m 14h 5m 12h 29m 10h 49m 9h 21m 8h 35m

Solar UV radiation in Troy, Idaho, United States §

Troy experiences the highest level of ultraviolet (UV) radiation in May, 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 Troy UV Index data.

Average daily maximum UV levels by month for Troy, Idaho, 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 9 10 9 7 5 3 2