Climate Insights for Hillman Airport

Sully County, Michigan, United States

Hottest
July
27°C peak
Coldest
February
-10°C low
Wettest
April
91mm rain
Best to Visit
June, July, August
Mild temps & low rain

Climate Overview

The climate in Hillman Airport is cool. The average annual temperature is 8°C and approximately 833mm of precipitation falls per year. Hillman Airport receives a notable amount of rainfall throughout the year, including during its driest month. Hillman Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, March, when temperatures can drop to -10°C. Snowfall occurs from January to December, with around 116cm 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: -6° Min: -9° Feb Max: -1° Average: -6° Min: -10° Mar Max: 5° Average: 0° Min: -5° Apr Max: 12° Average: 5° Min: 1° May Max: 20° Average: 13° Min: 7° Jun Max: 25° Average: 18° Min: 12° Jul Max: 27° Average: 21° Min: 15° Aug Max: 26° Average: 20° Min: 15° Sep Max: 22° Average: 16° Min: 12° Oct Max: 15° Average: 10° Min: 6° Nov Max: 7° Average: 3° Min: 0° Dec Max: 1° Average: -2° Min: -4°
Max
Average
Min

Hillman Airport has a wide annual temperature range, spanning 37°C from the coldest to warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 21°C. The coldest month is February, when overnight lows fall to -10°C and the daily average is -6°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 8°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 46mm Snow: 28mm Feb Precipitation: 41mm Snow: 22mm Mar Precipitation: 65mm Snow: 19mm Apr Precipitation: 91mm Snow: 13mm May Precipitation: 79mm Snow: 0mm Jun Precipitation: 85mm Snow: 0mm Jul Precipitation: 89mm Snow: 0mm Aug Precipitation: 88mm Snow: 0mm Sep Precipitation: 63mm Snow: 0mm Oct Precipitation: 82mm Snow: 1mm Nov Precipitation: 51mm Snow: 10mm Dec Precipitation: 54mm Snow: 23mm
Precipitation
Snow

Hillman Airport is a moderately rainy area, receiving approximately 833mm of precipitation annually, which averages out to around 69mm per month. The wettest month is April, averaging 91mm of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 41mm. That's 49mm less than April, 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 116cm accumulating over the season. January typically sees the most snow at around 28cm.

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: 17km/h Feb Wind Speed: 19km/h Mar Wind Speed: 18km/h Apr Wind Speed: 19km/h May Wind Speed: 16km/h Jun Wind Speed: 16km/h Jul Wind Speed: 14km/h Aug Wind Speed: 14km/h Sep Wind Speed: 15km/h Oct Wind Speed: 18km/h Nov Wind Speed: 19km/h Dec Wind Speed: 19km/h
Wind Speed

Hillman 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 February, averaging 19km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h 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 18km/h in winter, 18km/h in spring, 15km/h in summer, 17km/h in autumn.

Seasons

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

81 days until Summer

It is currently spring in Hillman Airport, which began on March 20, 2026. Hillman 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 27°C, while the coldest stretch bottoms out in February near -10°C. Summer is next, beginning on June 21, 2026 — 81 days from now.

Spring

Temperatures range from -5 to 20°C. Precipitation is moderate at around 235mm for the season, averaging 78mm per month. Winds are moderate at around 18km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 12 to 27°C. Precipitation is moderate at around 262mm for the season, averaging 87mm per month. Winds are generally light, averaging 15km/h. Comfortable clothing with a light layer for cooler evenings is all you need.

Autumn

Temperatures range from 0 to 22°C. Precipitation is moderate at around 195mm for the season, averaging 65mm per month. Expect around 11cm of snow accumulation during this period. Winds are moderate at around 17km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from -10 to 1°C. Rainfall is relatively light, with around 142mm over the season and a monthly average of 47mm. Expect around 73cm of snow accumulation during this period. Winds are moderate at around 18km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan -6°
Feb -6°
Mar
Apr
May 13°
Jun 18°
Jul 21°
Aug 20°
Sep 16°
Oct 10°
Nov
Dec -2°

The best time to visit Hillman Airport is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 81mm per month. By contrast, February can be quite cold with temperatures dropping to -10°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 Hillman 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
-9 °C
-2 °C
17 km/h
46 mm
28 cm
Feb
-10 °C
-1 °C
19 km/h
41 mm
22 cm
Mar
-5 °C
5 °C
18 km/h
65 mm
19 cm
Apr Current
1 °C
12 °C
19 km/h
91 mm
13 cm
May
7 °C
20 °C
16 km/h
79 mm
0 cm
Jun
12 °C
25 °C
16 km/h
85 mm
0 cm
Jul
15 °C
27 °C
14 km/h
89 mm
0 cm
Aug
15 °C
26 °C
14 km/h
88 mm
0 cm
Sep
12 °C
22 °C
15 km/h
63 mm
0 cm
Oct
6 °C
15 °C
18 km/h
82 mm
1 cm
Nov
0 °C
7 °C
19 km/h
51 mm
10 cm
Dec
-4 °C
1 °C
19 km/h
54 mm
23 cm
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