Climate Insights for Gelfius International Airport

Stevens County, Illinois, United States

Hottest
July
31°C peak
Coldest
January
-2°C low
Wettest
March
136mm rain
Best to Visit
September, October
Mild temps & low rain

Climate Overview

The climate in Gelfius International Airport is temperate. The average annual temperature is 15°C and approximately 1237mm of precipitation falls per year. Gelfius International Airport receives a notable amount of rainfall throughout the year, including during its driest month. Gelfius International Airport 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 -2°C. Light snow can occur between January and December.

Temperature

-10° 10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 6° Average: 1° Min: -2° Feb Max: 9° Average: 3° Min: -1° Mar Max: 15° Average: 9° Min: 5° Apr Max: 20° Average: 14° Min: 9° May Max: 26° Average: 20° Min: 16° Jun Max: 31° Average: 25° Min: 20° Jul Max: 31° Average: 26° Min: 22° Aug Max: 30° Average: 25° Min: 20° Sep Max: 28° Average: 22° Min: 17° Oct Max: 22° Average: 16° Min: 11° Nov Max: 14° Average: 8° Min: 4° Dec Max: 9° Average: 5° Min: 1°
Max
Average
Min

Temperatures in Gelfius International Airport vary considerably across the year, with a 33°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 26°C. The coldest month is January, when overnight lows fall to -2°C and the daily average is 1°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 7°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: 96mm Snow: 7mm Feb Precipitation: 97mm Snow: 11mm Mar Precipitation: 136mm Snow: 2mm Apr Precipitation: 129mm Snow: 0mm May Precipitation: 127mm Snow: 0mm Jun Precipitation: 87mm Snow: 0mm Jul Precipitation: 117mm Snow: 0mm Aug Precipitation: 107mm Snow: 0mm Sep Precipitation: 74mm Snow: 0mm Oct Precipitation: 82mm Snow: 0mm Nov Precipitation: 88mm Snow: 2mm Dec Precipitation: 96mm Snow: 3mm
Precipitation
Snow

Gelfius International Airport is a fairly wet location, receiving approximately 1237mm of precipitation annually, which averages out to around 103mm per month. The wettest month is March, averaging 136mm of rainfall. April and May also tend to see above-average precipitation. The driest month is September, with just 74mm. That's 62mm less than March, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between January and December, totalling around 25cm annually. February is the snowiest month with approximately 11cm.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 18km/h Feb Wind Speed: 19km/h Mar Wind Speed: 20km/h Apr Wind Speed: 20km/h May Wind Speed: 17km/h Jun Wind Speed: 15km/h Jul Wind Speed: 13km/h Aug Wind Speed: 13km/h Sep Wind Speed: 14km/h Oct Wind Speed: 17km/h Nov Wind Speed: 17km/h Dec Wind Speed: 18km/h
Wind Speed

Gelfius International Airport is mildly breezy, with an average annual wind speed of 17km/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 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 13km/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 19km/h in winter, 19km/h in spring, 14km/h in summer, 16km/h in autumn.

Seasons

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

84 days until Summer

It is currently spring in Gelfius International Airport, which began on March 20, 2026. Gelfius International Airport 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 31°C, while the coldest stretch bottoms out in January near -2°C. Summer is next, beginning on June 21, 2026 — 84 days from now.

Spring

Temperatures range from 5 to 26°C. Rainfall is heavy, totalling around 392mm across the season with a monthly average of 131mm. Winds are moderate at around 19km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 20 to 31°C. Rainfall is heavy, totalling around 311mm across the season with a monthly average of 104mm. Winds are generally light, averaging 14km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 4 to 28°C. Precipitation is moderate at around 245mm for the season, averaging 82mm per month. Winds are moderate at around 16km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -2 to 9°C. Precipitation is moderate at around 289mm for the season, averaging 96mm per month. Expect around 20cm of snow accumulation during this period. Winds are moderate at around 19km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan
Feb
Mar
Apr 14°
May 20°
Jun 25°
Jul 26°
Aug 25°
Sep 22°
Oct 16°
Nov
Dec

The best time to visit Gelfius International Airport is during September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 78mm per month. By contrast, July can be uncomfortably hot with highs reaching 31°C, while January is the coldest period with lows dropping to -2°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 Gelfius International Airport 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
-2 °C
6 °C
18 km/h
96 mm
7 cm
Feb
-1 °C
9 °C
19 km/h
97 mm
11 cm
Mar Current
5 °C
15 °C
20 km/h
136 mm
2 cm
Apr
9 °C
20 °C
20 km/h
129 mm
0 cm
May
16 °C
26 °C
17 km/h
127 mm
0 cm
Jun
20 °C
31 °C
15 km/h
87 mm
0 cm
Jul
22 °C
31 °C
13 km/h
117 mm
0 cm
Aug
20 °C
30 °C
13 km/h
107 mm
0 cm
Sep
17 °C
28 °C
14 km/h
74 mm
0 cm
Oct
11 °C
22 °C
17 km/h
82 mm
0 cm
Nov
4 °C
14 °C
17 km/h
88 mm
2 cm
Dec
1 °C
9 °C
18 km/h
96 mm
3 cm
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