Climate Insights for Pekin

Gray County, Illinois, United States

Hottest
July
30°C peak
Coldest
January
-6°C low
Wettest
May
124mm rain
Best to Visit
August, September
Mild temps & low rain

Climate Overview

The climate in Pekin is temperate. The average annual temperature is 12°C and approximately 1067mm of precipitation falls per year. Pekin receives a notable amount of rainfall throughout the year, including during its driest month. Pekin is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, February, December, when temperatures can drop to -6°C. Snowfall occurs from January to December, with around 67cm accumulating over the season.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 2° Average: -2° Min: -6° Feb Max: 5° Average: 0° Min: -4° Mar Max: 12° Average: 7° Min: 2° Apr Max: 18° Average: 12° Min: 7° May Max: 24° Average: 18° Min: 13° Jun Max: 30° Average: 24° Min: 19° Jul Max: 30° Average: 25° Min: 20° Aug Max: 29° Average: 24° Min: 19° Sep Max: 27° Average: 21° Min: 15° Oct Max: 20° Average: 14° Min: 9° Nov Max: 11° Average: 6° Min: 2° Dec Max: 6° Average: 1° Min: -3°
Max
Average
Min

Pekin has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is July, when average highs reach 30°C and the mean temperature sits around 25°C. The coldest month is January, when overnight lows fall to -6°C and the daily average is -2°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 8°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm 125mm 150mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 58mm Snow: 22mm Feb Precipitation: 57mm Snow: 16mm Mar Precipitation: 109mm Snow: 8mm Apr Precipitation: 115mm Snow: 4mm May Precipitation: 124mm Snow: 0mm Jun Precipitation: 119mm Snow: 0mm Jul Precipitation: 116mm Snow: 0mm Aug Precipitation: 100mm Snow: 0mm Sep Precipitation: 60mm Snow: 0mm Oct Precipitation: 93mm Snow: 2mm Nov Precipitation: 59mm Snow: 7mm Dec Precipitation: 57mm Snow: 8mm
Precipitation
Snow

Pekin is a moderately rainy area, receiving approximately 1067mm of precipitation annually, which averages out to around 89mm per month. The wettest month is May, averaging 124mm of rainfall. June and July also tend to see above-average precipitation. The driest month is February, with just 57mm. That's 67mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 67cm accumulating over the season. January typically sees the most snow at around 22cm.

Wind

0km/h 5km/h 10km/h 15km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 14km/h Feb Wind Speed: 15km/h Mar Wind Speed: 15km/h Apr Wind Speed: 15km/h May Wind Speed: 13km/h Jun Wind Speed: 12km/h Jul Wind Speed: 10km/h Aug Wind Speed: 10km/h Sep Wind Speed: 11km/h Oct Wind Speed: 14km/h Nov Wind Speed: 14km/h Dec Wind Speed: 14km/h
Wind Speed

Pekin is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 14km/h in winter, 15km/h in spring, 11km/h in summer, 13km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

7 days until Autumn

It is currently summer in Pekin, which began on June 21, 2026. Pekin is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 30°C, while the coldest stretch bottoms out in January near -6°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

Spring

Temperatures range from 2 to 24°C. Rainfall is heavy, totalling around 348mm across the season with a monthly average of 116mm. Winds are generally light, averaging 15km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 19 to 30°C. Rainfall is heavy, totalling around 335mm across the season with a monthly average of 112mm. Winds are generally light, averaging 11km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.

Autumn

Temperatures range from 2 to 27°C. Precipitation is moderate at around 212mm for the season, averaging 71mm per month. Expect around 9cm of snow accumulation during this period. Winds are generally light, averaging 13km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -6 to 6°C. Precipitation is moderate at around 172mm for the season, averaging 57mm per month. Expect around 46cm of snow accumulation during this period. Winds are generally light, averaging 14km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan -2°
Feb
Mar
Apr 12°
May 18°
Jun 24°
Jul 25°
Aug 24°
Sep 21°
Oct 14°
Nov
Dec

The best time to visit Pekin is during August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 80mm per month. By contrast, July can be uncomfortably hot with highs reaching 30°C, while January is the coldest period with lows dropping to -6°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

Monthly Climate Data

The table below shows monthly climate averages for Pekin based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
-6 °C
2 °C
14 km/h
58 mm
22 cm
Feb
-4 °C
5 °C
15 km/h
57 mm
16 cm
Mar
2 °C
12 °C
15 km/h
109 mm
8 cm
Apr
7 °C
18 °C
15 km/h
115 mm
4 cm
May
13 °C
24 °C
13 km/h
124 mm
0 cm
Jun
19 °C
30 °C
12 km/h
119 mm
0 cm
Jul
20 °C
30 °C
10 km/h
116 mm
0 cm
Aug
19 °C
29 °C
10 km/h
100 mm
0 cm
Sep Current
15 °C
27 °C
11 km/h
60 mm
0 cm
Oct
9 °C
20 °C
14 km/h
93 mm
2 cm
Nov
2 °C
11 °C
14 km/h
59 mm
7 cm
Dec
-3 °C
6 °C
14 km/h
57 mm
8 cm
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Metric (°C, km/h)