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Monthly climate in Saint David, Illinois, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Saint David features a humid continental climate (Dfa).Temperatures typically range between -3 °C (27 °F) and 25 °C (78 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 36 °C (96 °F).The average annual precipitation amounts to about 1181 mm (46.5 inches) and receives 121 rainy days on the 1 mm (0.04 inches) threshold annually.Saint David enjoys an average of 2964 hours of sunshine throughout the year, and daylight varies from 9 hours 18 minutes to 15 hours 0 minutes per day.

Monthly average temperatures in Saint David, Illinois, United States §

The warmest months in Saint David are June, July and August, with daily mean temperatures ranging from 24 to 25 °C (75 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to 1 °C (27 - 35 °F) throughout the day. On average each year, Saint David experiences 107 days above 25 °C (77.0 °F) and 99 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 David, Illinois, 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 15°C
(59°F)		 23°C
(73°F)		 25°C
(77°F)		 28°C
(84°F)		 35°C
(96°F)		 34°C
(93°F)		 35°C
(96°F)		 36°C
(96°F)		 34°C
(94°F)		 32°C
(90°F)		 24°C
(76°F)		 21°C
(70°F)
Mean maximum 13°C
(55°F)		 16°C
(61°F)		 21°C
(70°F)		 27°C
(81°F)		 32°C
(90°F)		 33°C
(91°F)		 34°C
(94°F)		 33°C
(92°F)		 33°C
(91°F)		 30°C
(86°F)		 19°C
(66°F)		 17°C
(63°F)
Average high 1°C
(35°F)		 3°C
(38°F)		 11°C
(52°F)		 16°C
(61°F)		 23°C
(74°F)		 29°C
(84°F)		 30°C
(86°F)		 29°C
(84°F)		 27°C
(81°F)		 18°C
(66°F)		 9°C
(49°F)		 6°C
(43°F)
Daily mean -3°C
(27°F)		 -1°C
(30°F)		 6°C
(42°F)		 11°C
(52°F)		 18°C
(65°F)		 24°C
(75°F)		 25°C
(78°F)		 24°C
(75°F)		 21°C
(70°F)		 13°C
(56°F)		 5°C
(41°F)		 1°C
(35°F)
Average low -7°C
(20°F)		 -6°C
(22°F)		 1°C
(34°F)		 6°C
(42°F)		 13°C
(56°F)		 18°C
(65°F)		 20°C
(69°F)		 18°C
(65°F)		 16°C
(60°F)		 9°C
(48°F)		 0°C
(33°F)		 -3°C
(27°F)
Mean minimum -21°C
(-5°F)		 -20°C
(-4°F)		 -10°C
(14°F)		 -3°C
(28°F)		 4°C
(40°F)		 13°C
(56°F)		 15°C
(60°F)		 13°C
(56°F)		 8°C
(47°F)		 -1°C
(31°F)		 -9°C
(15°F)		 -13°C
(9°F)
Minimum -29°C
(-20°F)		 -29°C
(-19°F)		 -18°C
(0°F)		 -8°C
(18°F)		 0°C
(32°F)		 10°C
(51°F)		 13°C
(55°F)		 12°C
(55°F)		 6°C
(42°F)		 -3°C
(26°F)		 -14°C
(7°F)		 -21°C
(-5°F)

Compare climate in Saint David with other places

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

Monthly average precipitation in Saint David, Illinois, United States §

Saint David usually has the most precipitation in March, May and June, with an average of 12 rainy days and 147 mm (5.8 inches) of precipitation per month.The driest months in Saint David are January, November and December. On average, 58 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Saint David, Illinois, 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) 62 (2.4) 68 (2.7) 121 (4.8) 113 (4.4) 168 (6.6) 152 (6.0) 106 (4.2) 87 (3.4) 72 (2.8) 121 (4.8) 59 (2.3) 53 (2.1)
Average precipitation days (≥ 1 mm) 8 11 11 11 15 11 11 10 7 11 9 6

Monthly sunshine hours in Saint David, Illinois, United States §

The sunniest months in Saint David are June, July and August, when the sun shines an average of 11 hours 7 minutes a day.Least sunny months in Saint David: January, February and December receive an average of 5 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Saint David, Illinois, 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 119 176 212 236 282 335 351 335 287 228 199 198
Mean daily daylight hours 9h 38m 10h 39m 11h 58m 13h 19m 14h 27m 15h 0m 14h 42m 13h 41m 12h 24m 11h 4m 9h 54m 9h 18m

Solar UV radiation in Saint David, Illinois, United States §

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

Average daily maximum UV levels by month for Saint David, Illinois, 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 7 8 10 11 10 9 8 6 4 2