Climate Insights for Carthage

El Paso County, Illinois, United States

Hottest
Luglio
28°C peak
Coldest
Gennaio
-8°C low
Wettest
Maggio
126mm rain
Best to Visit
Luglio, Agosto, Settembre
Mild temps & low rain

Climate Overview

The climate in Carthage is temperate. The average annual temperature is 11°C and approximately 1012mm of precipitation falls per year. Carthage receives a notable amount of rainfall throughout the year, including during its driest month. Carthage is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Luglio, Giugno, Agosto. The coldest months are Gennaio, Febbraio, Dicembre, when temperatures can drop to -8°C. Snowfall occurs from January to December, with around 74cm accumulating over the season.

Temperature

-10° 10° 20° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: -1° Average: -5° Min: -8° Feb Max: 2° Average: -3° Min: -7° Mar Max: 10° Average: 4° Min: 0° Apr Max: 16° Average: 10° Min: 5° May Max: 22° Average: 17° Min: 12° Jun Max: 28° Average: 22° Min: 17° Jul Max: 28° Average: 24° Min: 19° Aug Max: 28° Average: 22° Min: 18° Sep Max: 25° Average: 20° Min: 15° Oct Max: 18° Average: 12° Min: 8° Nov Max: 9° Average: 5° Min: 1° Dec Max: 3° Average: 0° Min: -4°
Max
Average
Min

Carthage has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is Luglio, when average highs reach 28°C and the mean temperature sits around 24°C. The coldest month is Gennaio, when overnight lows fall to -8°C and the daily average is -5°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, 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: 55mm Snow: 23mm Feb Precipitation: 48mm Snow: 15mm Mar Precipitation: 86mm Snow: 11mm Apr Precipitation: 110mm Snow: 6mm May Precipitation: 126mm Snow: 0mm Jun Precipitation: 106mm Snow: 0mm Jul Precipitation: 94mm Snow: 0mm Aug Precipitation: 77mm Snow: 0mm Sep Precipitation: 97mm Snow: 0mm Oct Precipitation: 86mm Snow: 2mm Nov Precipitation: 62mm Snow: 8mm Dec Precipitation: 65mm Snow: 11mm
Precipitation
Snow

Carthage is a moderately rainy area, receiving approximately 1012mm of precipitation annually, which averages out to around 84mm per month. The wettest month is May, averaging 126mm of rainfall. April and June also tend to see above-average precipitation. The driest month is February, with just 48mm. That's 78mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 74cm accumulating over the season. January typically sees the most snow at around 23cm.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 19km/h Feb Wind Speed: 21km/h Mar Wind Speed: 21km/h Apr Wind Speed: 23km/h May Wind Speed: 20km/h Jun Wind Speed: 18km/h Jul Wind Speed: 16km/h Aug Wind Speed: 16km/h Sep Wind Speed: 18km/h Oct Wind Speed: 21km/h Nov Wind Speed: 21km/h Dec Wind Speed: 20km/h
Wind Speed

Carthage is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/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 20km/h in winter, 21km/h in spring, 17km/h in summer, 20km/h in autumn.

Seasons

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

92 days until Summer

It is currently spring in Carthage, which began on March 20, 2026. Carthage 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 Luglio at around 28°C, while the coldest stretch bottoms out in Gennaio near -8°C. Summer is next, beginning on June 21, 2026 — 92 days from now.

Spring

Temperatures range from 0 to 22°C. Rainfall is heavy, totalling around 322mm across the season with a monthly average of 107mm. Winds are moderate at around 21km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 17 to 28°C. Precipitation is moderate at around 278mm for the season, averaging 93mm per month. Winds are moderate at around 17km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 1 to 25°C. Precipitation is moderate at around 246mm for the season, averaging 82mm per month. Expect around 9cm of snow accumulation during this period. Winds are moderate at around 20km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -8 to 3°C. Precipitation is moderate at around 167mm for the season, averaging 56mm per month. Expect around 49cm of snow accumulation during this period. Winds are moderate at around 20km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan -5°
Feb -3°
Mar
Apr 10°
May 17°
Jun 22°
Jul 24°
Aug 22°
Sep 20°
Oct 12°
Nov
Dec

The best time to visit Carthage is during Luglio, Agosto and Settembre, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 90mm per month. By contrast, Gennaio can be quite cold with temperatures dropping to -8°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 Carthage 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
-8 °C
-1 °C
19 km/h
55 mm
23 cm
Feb
-7 °C
2 °C
21 km/h
48 mm
15 cm
Mar Current
0 °C
10 °C
21 km/h
86 mm
11 cm
Apr
5 °C
16 °C
23 km/h
110 mm
6 cm
May
12 °C
22 °C
20 km/h
126 mm
0 cm
Jun
17 °C
28 °C
18 km/h
106 mm
0 cm
Jul
19 °C
28 °C
16 km/h
94 mm
0 cm
Aug
18 °C
28 °C
16 km/h
77 mm
0 cm
Sep
15 °C
25 °C
18 km/h
97 mm
0 cm
Oct
8 °C
18 °C
21 km/h
86 mm
2 cm
Nov
1 °C
9 °C
21 km/h
62 mm
8 cm
Dec
-4 °C
3 °C
20 km/h
65 mm
11 cm
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Metric (°C, km/h)