Climate Insights for Elm Grove

Waukesha County, Wisconsin, United States

Hottest
July
26°C peak
Coldest
January
-6°C low
Wettest
May
105mm rain
Best to Visit
June, July, August
Mild temps & low rain

Climate Overview

The climate in Elm Grove is cool. The average annual temperature is 9°C and approximately 933mm of precipitation falls per year. Elm Grove receives a notable amount of rainfall throughout the year, including during its driest month. Elm Grove 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 -6°C. Snowfall occurs from January to December, with around 85cm 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: -4° Min: -6° Feb Max: 1° Average: -3° Min: -6° Mar Max: 6° Average: 2° Min: -1° Apr Max: 11° Average: 7° Min: 4° May Max: 17° Average: 13° Min: 9° Jun Max: 23° Average: 19° Min: 15° Jul Max: 26° Average: 22° Min: 19° Aug Max: 25° Average: 22° Min: 19° Sep Max: 22° Average: 19° Min: 16° Oct Max: 16° Average: 12° Min: 9° Nov Max: 8° Average: 5° Min: 2° Dec Max: 3° Average: 0° Min: -2°
Max
Average
Min

Temperatures in Elm Grove vary considerably across the year, with a 32°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 26°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -6°C and the daily average is -4°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. 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: 59mm Snow: 26mm Feb Precipitation: 46mm Snow: 18mm Mar Precipitation: 78mm Snow: 12mm Apr Precipitation: 104mm Snow: 8mm May Precipitation: 105mm Snow: 0mm Jun Precipitation: 86mm Snow: 0mm Jul Precipitation: 82mm Snow: 0mm Aug Precipitation: 73mm Snow: 0mm Sep Precipitation: 88mm Snow: 0mm Oct Precipitation: 94mm Snow: 1mm Nov Precipitation: 58mm Snow: 6mm Dec Precipitation: 60mm Snow: 14mm
Precipitation
Snow

Elm Grove is a moderately rainy area, receiving approximately 933mm of precipitation annually, which averages out to around 78mm per month. The wettest month is May, averaging 105mm of rainfall. April and October also tend to see above-average precipitation. The driest month is February, with just 46mm. That's 60mm 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 85cm accumulating over the season. January typically sees the most snow at around 26cm.

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: 23km/h Feb Wind Speed: 25km/h Mar Wind Speed: 24km/h Apr Wind Speed: 23km/h May Wind Speed: 21km/h Jun Wind Speed: 20km/h Jul Wind Speed: 18km/h Aug Wind Speed: 18km/h Sep Wind Speed: 20km/h Oct Wind Speed: 24km/h Nov Wind Speed: 24km/h Dec Wind Speed: 25km/h
Wind Speed

Elm Grove is moderately windy, with an average annual wind speed of 22km/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 25km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 18km/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 24km/h in winter, 23km/h in spring, 18km/h in summer, 23km/h in autumn.

Seasons

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

86 days until Summer

It is currently spring in Elm Grove, which began on March 20, 2026. Elm Grove 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 26°C, while the coldest stretch bottoms out in January near -6°C. Summer is next, beginning on June 21, 2026 — 86 days from now.

Spring

Temperatures range from -1 to 17°C. Precipitation is moderate at around 287mm for the season, averaging 96mm per month. Winds are moderate at around 23km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 15 to 26°C. Precipitation is moderate at around 242mm for the season, averaging 81mm per month. Winds are moderate at around 18km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 2 to 22°C. Precipitation is moderate at around 240mm for the season, averaging 80mm per month. Expect around 7cm of snow accumulation during this period. Winds are moderate at around 23km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from -6 to 3°C. Precipitation is moderate at around 164mm for the season, averaging 55mm per month. Expect around 57cm of snow accumulation during this period. Winds are moderate at around 24km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.

Best Time to Visit

Jan -4°
Feb -3°
Mar
Apr
May 13°
Jun 19°
Jul 22°
Aug 22°
Sep 19°
Oct 12°
Nov
Dec

The best time to visit Elm Grove is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 82mm per month. By contrast, January can be quite cold with temperatures 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 Elm Grove 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
-1 °C
23 km/h
59 mm
26 cm
Feb
-6 °C
1 °C
25 km/h
46 mm
18 cm
Mar Current
-1 °C
6 °C
24 km/h
78 mm
12 cm
Apr
4 °C
11 °C
23 km/h
104 mm
8 cm
May
9 °C
17 °C
21 km/h
105 mm
0 cm
Jun
15 °C
23 °C
20 km/h
86 mm
0 cm
Jul
19 °C
26 °C
18 km/h
82 mm
0 cm
Aug
19 °C
25 °C
18 km/h
73 mm
0 cm
Sep
16 °C
22 °C
20 km/h
88 mm
0 cm
Oct
9 °C
16 °C
24 km/h
94 mm
1 cm
Nov
2 °C
8 °C
24 km/h
58 mm
6 cm
Dec
-2 °C
3 °C
25 km/h
60 mm
14 cm
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Metric (°C, km/h)