Quincy, IL weather and climate in 2025
Day
4 °C
Night
-5 °C
Sea
0 °C
Precipitation
58 mm
in month
Rainy days
8 days
in month
Daylight
9 hours
average
Sunshine
4 hours
average
Humidity
75 %
Day
4 °C
Night
-5 °C
Sea
0 °C
Precipitation
58 mm
in month
Rainy days
8 days
in month
Daylight
9 hours
average
Sunshine
4 hours
average
Humidity
75 %
Overview: Quincy, IL
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Weather overview for Quincy, IL
Weather overview
Quincy, IL, experiences a humid continental climate with hot summers and cold winters. The warmest month is July, with daytime high temperatures reaching an average of 31 °C (87 °F), while January is the chilliest month with daytime highs around 2 °C (35 °F). Precipitation is fairly evenly distributed throughout the year, though May tends to be the wettest month with an average rainfall of 118 mm (4.63 in). Despite the variation in temperatures, each season offers its own charm, with winter snow, vibrant spring, warm summer, and colorful autumn.
January weather
January in Quincy, IL, brings the coldest temperatures of the year, with night temps averaging -7 °C (19 °F) and day temps reaching around 2 °C (35 °F). The landscapes are often covered in snow, and the winds can be quite brisk, averaging 4 m/s.
February weather
As February arrives, there's a slight increase in temperatures with daytime highs edging up to 5 °C (40 °F), while nights remain cold averaging -5 °C (22 °F). Quincy's landscape is still wintery, and the relative humidity hangs around 72 %.
March weather
March sees a notable transition with spring starting to nudge away the winter chill. Daytime highs climb to a more comfortable 11 °C (53 °F), though nights can still be cold at 0 °C (32 °F), and wind speeds average 5 m/s.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.April weather
April's weather elevates the feel of spring, with daytime temperatures reaching an average high of 18 °C (65 °F). The rainy days increase slightly, numbering 11, with a mean wind speed of 5 m/s and the showering of spring rains totaling an average of 95 mm (3.75 in).
May weather
May brings the warmth and beauty of late spring with temperatures soaring up to 23 °C (74 °F) during the day, but the nights remain fairly cool at 12 °C (53 °F). Expect the most precipitation of any month, averaging 118 mm (4.63 in) over 12, and the world around Quincy becomes lush and green.
June weather
June ushers in the start of summer with the highest daytime temperatures reaching an average of 28 °C (83 °F). Although there's a slight decline in rainy days to 11, humidity levels tend to rise, making the heat feel more intense.
July weather
July is the peak of summer in Quincy, with temperatures soaring to a high of 31 °C (87 °F), providing perfect weather for outdoor summer activities. The nights are also warm, averaging 19 °C (67 °F). There are about 10 of rain, so it’s still a good idea to keep an umbrella nearby just in case.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.August weather
August slightly retreats from the July heat with daytime highs averaging 30 °C (85 °F) and a fair share of sunny days to enjoy late-summer activities. The nights start to cool a bit more, dipping to an average of 18 °C (65 °F), and residents can expect around 9 of wet weather.
September weather
September in Quincy heralds the beginning of autumn, as temperatures begin to drop to more moderate levels with daytime highs around 26 °C (78 °F). Nights can feel the autumn chill setting in as they average 13 °C (56 °F), and the wind speeds pick up, averaging 3 m/s.
October weather
October sees a more pronounced drop in temperature, with day highs falling to a brisk 19 °C (66 °F). The nights get colder, averaging 7 °C (44 °F), and it's the perfect time to watch the leaves change their colors. There are around 8 of rainy weather, adding to the charm of the fall season.
November weather
November in Quincy is a prelude to winter, with daytime temperatures reaching a cooler 12 °C (53 °F), while nighttime averages drop to around 1 °C (34 °F). The city experiences about 9 of wet weather, including the possibility of early snow flurries.
December weather
December rolls in with the chill of approaching winter. Daytime highs moderate around 4 °C (38 °F) and nights are quite cold, averaging -5 °C (22 °F). The wet weather is less frequent than earlier months, with about 8. The wind calms a bit too, with a speed of 4 m/s.
FAQs
How many layers should I wear in Quincy during January?
Proper layering is essential in January; you'll want to wear thermal undergarments, a warm middle layer, and a windproof outer layer to cope with the daytime highs of around 2 °C (35 °F) and chilly winds.
Is February much warmer than January in Quincy?
February is just a notch warmer with daytime highs reaching 5 °C (40 °F). While the air may feel slightly less biting, you'll still need to dress warmly to handle the cold.
Can I start wearing spring attire in March in Quincy?
The arrival of spring does mean warmer days nearing 11 °C (53 °F), but you'll still want a jacket for the evenings. Layer lightly but keep a warmer option at hand for those still-cool nights.
Is April a wet month in Quincy?
With the ground thawing, April sees quite a bit of rain, marked by 11 of wet weather and an average precipitation of 95 mm (3.75 in).
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.What type of clothing is suitable for Quincy in May?
Comfortably warm days averaging 23 °C (74 °F) allow for lighter attire like T-shirts and pants, yet keeping a sweater handy for the cooler nights would be wise.
How will the weather feel in Quincy during June with the rising humidity?
With humidity averaging 68 % and temperatures hitting 28 °C (83 °F), June in Quincy feels quite warm and at times, muggy. Keeping hydrated and dressing in breathable fabrics will help you stay comfortable.
Is July typically the hottest month in Quincy?
Indeed, July is the hottest month with daytime temperatures peaking at 31 °C (87 °F). While the weather is ideal for swimming and barbecues, remember to apply sun protection and drink plenty of water.
Should I expect a break from the heat in Quincy during August?
August does bring a slight reprieve with daytime temperatures averaging 30 °C (85 °F), yet it still remains comfortably warm for all sorts of summer enjoyment.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.What is the fall transition like in Quincy during September?
The fall transition in September is gentle, with daytime temperatures still warm at 26 °C (78 °F), making it an excellent month for those who prefer less intense heat.
Is October a good month to enjoy the fall foliage in Quincy?
Absolutely, October's cooling temperatures and an average of 8 of rain contribute to the colorful tapestry of fall foliage that Quincy is adorned in.
How cold does it get in Quincy during November?
November definitely sees a dip in temperatures with a day high averaging 12 °C (53 °F), and you'll want to bundle up as the evening temps fall to just under freezing.
Will I need a heavy coat in Quincy for December?
A heavy coat is indeed a necessity, as December's daytime highs hover around 4 °C (38 °F), and the cold can be quite piercing, especially during the nights averaging -5 °C (22 °F).
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.