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Monthly climate in Rock Island, Quebec, Canada

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Rock Island features a humid continental climate (Dfb). Temperatures typically range between -8 °C (17 °F) and 20 °C (67 °F) through the year, but rarely can drop to -31 °C (-23 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 1234 mm (48.6 inches) and receives 170 rainy days on the 1 mm (0.04 inches) threshold annually. Rock Island enjoys an average of 2656 hours of sunshine throughout the year, and daylight varies from 8 hours 48 minutes to 15 hours 32 minutes per day.

Monthly average temperatures in Rock Island, Quebec, Canada §

The warmest months in Rock Island are June, July and August, with daily mean temperatures ranging from 17 to 20 °C (62 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -8 to -5 °C (17 - 23 °F) throughout the day. On average each year, Rock Island experiences 30 days above 25 °C (77.0 °F) and 146 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rock Island, Quebec, Canada. 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 11°C
(52°F)		 15°C
(59°F)		 20°C
(69°F)		 24°C
(76°F)		 32°C
(89°F)		 31°C
(89°F)		 32°C
(90°F)		 32°C
(89°F)		 29°C
(85°F)		 25°C
(77°F)		 22°C
(72°F)		 14°C
(58°F)
Mean maximum 6°C
(44°F)		 9°C
(48°F)		 13°C
(56°F)		 20°C
(69°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(85°F)		 30°C
(85°F)		 27°C
(80°F)		 22°C
(72°F)		 16°C
(60°F)		 10°C
(50°F)
Average high -4°C
(24°F)		 -2°C
(28°F)		 2°C
(35°F)		 9°C
(49°F)		 17°C
(63°F)		 22°C
(71°F)		 24°C
(76°F)		 23°C
(75°F)		 20°C
(68°F)		 13°C
(55°F)		 4°C
(39°F)		 -2°C
(29°F)
Daily mean -8°C
(17°F)		 -7°C
(20°F)		 -3°C
(27°F)		 5°C
(40°F)		 12°C
(53°F)		 17°C
(62°F)		 20°C
(67°F)		 19°C
(66°F)		 14°C
(58°F)		 8°C
(47°F)		 0°C
(33°F)		 -5°C
(23°F)
Average low -13°C
(9°F)		 -12°C
(11°F)		 -7°C
(20°F)		 0°C
(33°F)		 6°C
(44°F)		 11°C
(52°F)		 15°C
(59°F)		 14°C
(58°F)		 10°C
(50°F)		 5°C
(41°F)		 -4°C
(26°F)		 -9°C
(15°F)
Mean minimum -26°C
(-14°F)		 -24°C
(-11°F)		 -20°C
(-4°F)		 -9°C
(16°F)		 -1°C
(30°F)		 6°C
(42°F)		 9°C
(48°F)		 7°C
(45°F)		 1°C
(35°F)		 -3°C
(26°F)		 -15°C
(5°F)		 -23°C
(-9°F)
Minimum -31°C
(-23°F)		 -27°C
(-16°F)		 -23°C
(-8°F)		 -14°C
(7°F)		 -2°C
(29°F)		 0°C
(33°F)		 8°C
(46°F)		 5°C
(42°F)		 -4°C
(26°F)		 -6°C
(22°F)		 -19°C
(-2°F)		 -28°C
(-18°F)

Compare climate in Rock Island with other places

Compare temperature, precipitation, sunshine, UV index in Rock Island, Quebec, Canada with other places around the world.

Monthly average precipitation in Rock Island, Quebec, Canada §

Rock Island usually has the most precipitation in June, July and October, with an average of 14 rainy days and 128 mm (5.0 inches) of precipitation per month. The driest months in Rock Island are February, March and September. On average, 82 mm (3.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rock Island, Quebec, Canada. 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) 88 (3.5) 82 (3.2) 80 (3.1) 112 (4.4) 103 (4.1) 116 (4.5) 119 (4.7) 104 (4.1) 83 (3.3) 149 (5.9) 114 (4.5) 84 (3.3)
Average precipitation days (≥ 1 mm) 13 15 12 16 13 14 15 16 9 15 16 16

Monthly sunshine hours in Rock Island, Quebec, Canada §

The sunniest months in Rock Island are June, July and August, when the sun shines an average of 10 hours 36 minutes a day. Least sunny months in Rock Island: January, November and December receive an average of 3 hours 59 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rock Island, Quebec, Canada. 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 104 146 216 208 271 320 327 328 282 185 134 128
Mean daily daylight hours 9h 12m 10h 25m 11h 57m 13h 31m 14h 52m 15h 32m 15h 10m 13h 58m 12h 27m 10h 54m 9h 31m 8h 48m

Solar UV radiation in Rock Island, Quebec, Canada §

Rock Island experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 9 - 9, 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 Rock Island UV Index data.

Average daily maximum UV levels by month for Rock Island, Quebec, Canada. 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 7 9 9 9 8 7 5 3 2

Detailed Monthly Weather Insights for Rock Island, Quebec, Canada

Discover in-depth weather details for every month in Rock Island. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Rock Island's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.