Climate Insights for Mission

Todd County, South Dakota, United States

Hottest
July
31°C peak
Coldest
January
-9°C low
Wettest
May
115mm rain
Best to Visit
June, July, August
Mild temps & low rain

Climate Overview

The climate in Mission is cool. The average annual temperature is 9°C and approximately 649mm of precipitation falls per year. May is the wettest month, receiving around 115mm of rainfall. Mission 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 January, February, December, when temperatures can drop to -9°C. Snowfall occurs from January to December, with around 157cm accumulating over the season.

Temperature

-10° 10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 1° Average: -5° Min: -9° Feb Max: 3° Average: -4° Min: -9° Mar Max: 10° Average: 2° Min: -3° Apr Max: 15° Average: 7° Min: 1° May Max: 20° Average: 14° Min: 8° Jun Max: 29° Average: 22° Min: 16° Jul Max: 31° Average: 24° Min: 18° Aug Max: 29° Average: 22° Min: 16° Sep Max: 26° Average: 18° Min: 12° Oct Max: 15° Average: 8° Min: 3° Nov Max: 11° Average: 3° Min: -1° Dec Max: 3° Average: -3° Min: -8°
Max
Average
Min

Mission has a wide annual temperature range, spanning 40°C from the coldest to warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 24°C. The coldest month is January, when overnight lows fall to -9°C and the daily average is -5°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 10°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: 23mm Snow: 21mm Feb Precipitation: 23mm Snow: 20mm Mar Precipitation: 57mm Snow: 27mm Apr Precipitation: 89mm Snow: 33mm May Precipitation: 115mm Snow: 1mm Jun Precipitation: 63mm Snow: 0mm Jul Precipitation: 77mm Snow: 0mm Aug Precipitation: 55mm Snow: 0mm Sep Precipitation: 51mm Snow: 0mm Oct Precipitation: 43mm Snow: 13mm Nov Precipitation: 22mm Snow: 15mm Dec Precipitation: 33mm Snow: 28mm
Precipitation
Snow

Mission is a relatively dry area, receiving approximately 649mm of precipitation annually, which averages out to around 54mm per month. The wettest month is May, averaging 115mm of rainfall. April and July also tend to see above-average precipitation. The driest month is November, with just 22mm. That's 93mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 157cm accumulating over the season. April typically sees the most snow at around 33cm.

Wind

0km/h 5km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 4km/h Feb Wind Speed: 5km/h Mar Wind Speed: 5km/h Apr Wind Speed: 5km/h May Wind Speed: 4km/h Jun Wind Speed: 4km/h Jul Wind Speed: 4km/h Aug Wind Speed: 4km/h Sep Wind Speed: 5km/h Oct Wind Speed: 5km/h Nov Wind Speed: 5km/h Dec Wind Speed: 5km/h
Wind Speed

Mission is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

Seasons

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

81 days until Autumn

It is currently summer in Mission, which began on June 21, 2026. Mission 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 -9°C. Autumn is next, beginning on September 23, 2026 — 81 days from now.

Spring

Temperatures range from -3 to 20°C. Precipitation is moderate at around 261mm for the season, averaging 87mm per month. Winds are generally light, averaging 5km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 16 to 31°C. Precipitation is moderate at around 195mm for the season, averaging 65mm per month. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from -1 to 26°C. Rainfall is relatively light, with around 115mm over the season and a monthly average of 38mm. Expect around 28cm of snow accumulation during this period. Winds are generally light, averaging 5km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from -9 to 3°C. Rainfall is relatively light, with around 78mm over the season and a monthly average of 26mm. Expect around 69cm of snow accumulation during this period. Winds are generally light, averaging 5km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan -5°
Feb -4°
Mar
Apr
May 14°
Jun 22°
Jul 24°
Aug 22°
Sep 18°
Oct
Nov
Dec -3°

The best time to visit Mission is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 61mm per month. By contrast, January can be quite cold with temperatures dropping to -9°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

Monthly Climate Data

The table below shows monthly climate averages for Mission 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
1 °C
4 km/h
23 mm
21 cm
Feb
-9 °C
3 °C
5 km/h
23 mm
20 cm
Mar
-3 °C
10 °C
5 km/h
57 mm
27 cm
Apr
1 °C
15 °C
5 km/h
89 mm
33 cm
May
8 °C
20 °C
4 km/h
115 mm
1 cm
Jun
16 °C
29 °C
4 km/h
63 mm
0 cm
Jul Current
18 °C
31 °C
4 km/h
77 mm
0 cm
Aug
16 °C
29 °C
4 km/h
55 mm
0 cm
Sep
12 °C
26 °C
5 km/h
51 mm
0 cm
Oct
3 °C
15 °C
5 km/h
43 mm
13 cm
Nov
-1 °C
11 °C
5 km/h
22 mm
15 cm
Dec
-8 °C
3 °C
5 km/h
33 mm
28 cm
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