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Quincy, IL weather and climate

Adams County, IL · population 39,188 · about 633 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Quincy's own coordinates.

The year at a glance

Sunny days
201
clear or partly cloudy, per year
Precipitation
38 in
per year
Wet days
112
rain or snow per year
Snowfall
17 in
per year
Hot days
31
above 90 °F
Freezing nights
112
at or below 32 °F
Humidity
68%
average relative
Average temperature
54 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 35 °FDaily high, Feb: 40 °FDaily high, Mar: 52 °FDaily high, Apr: 64 °FDaily high, May: 74 °FDaily high, Jun: 83 °FDaily high, Jul: 87 °FDaily high, Aug: 85 °FDaily high, Sep: 79 °FDaily high, Oct: 66 °FDaily high, Nov: 52 °FDaily high, Dec: 40 °FDaily low, Jan: 19 °FDaily low, Feb: 23 °FDaily low, Mar: 32 °FDaily low, Apr: 43 °FDaily low, May: 54 °FDaily low, Jun: 64 °FDaily low, Jul: 67 °FDaily low, Aug: 65 °FDaily low, Sep: 57 °FDaily low, Oct: 45 °FDaily low, Nov: 34 °FDaily low, Dec: 24 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high354052647483878579665240
Daily low192332435464676557453424

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovQuincy, Jan: 1.9 inQuincy, Feb: 2.2 inQuincy, Mar: 2.9 inQuincy, Apr: 4.4 inQuincy, May: 4.6 inQuincy, Jun: 4.0 inQuincy, Jul: 3.4 inQuincy, Aug: 3.2 inQuincy, Sep: 3.3 inQuincy, Oct: 2.8 inQuincy, Nov: 2.9 inQuincy, Dec: 2.1 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Quincy1.92.22.94.44.64.03.43.23.32.82.92.1

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovQuincy, Jan: 14 daysQuincy, Feb: 13 daysQuincy, Mar: 15 daysQuincy, Apr: 15 daysQuincy, May: 16 daysQuincy, Jun: 17 daysQuincy, Jul: 21 daysQuincy, Aug: 22 daysQuincy, Sep: 21 daysQuincy, Oct: 19 daysQuincy, Nov: 17 daysQuincy, Dec: 14 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Quincy141315151617212221191714

Compare Quincy with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Illinois city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).