Climate and monthly weather forecastWest Allis, WI
Climate and monthly weather forecast
The climate of West Allis
Located in the state of Wisconsin, West Allis experiences the Köppen climate classification of Dfb - Humid continental, no dry season, warm summer. This means the area has a broad range of weather characteristics over the 12-month period; from chilly, snowy winters to moderately warm and humid summers.Through the year, West Allis undergoes a noticeable change in temperature. Recorded average high temperatures show a dynamic shift, transitioning from a chilly 26.1°F (-3.3°C) in January, the coldest month, to a pleasant 77.9°F (25.5°C) in July, the warmest month. Similarly, the average low temperatures vary between 16.2°F (-8.8°C) in January and 64.2°F (17.9°C) in July - this temperature range clearly outlines the cold winters and warm summers typical of the Dfb climate.
Humidity levels are relatively stable throughout the year, averaging from 75% in October to 85% in January. Precipitation displays a relatively even distribution as well within the year. The driest month appears to be February with rainfall of 0.83" (21mm) while the wettest month is almost a tie between June and August with respective rainfall of 2.56" (65mm) and 2.17" (55mm). On the opposite spectrum, snowfall occurs exclusively between November to April, with January experiencing the highest snowfall at 3.03" (77mm).
Particularly, West Allis experiences the unique, yet typical pattern of the Dfb climate - winters with snowfall and summers with rainfall but no snow. Likewise, the daylight hours fluctuate significantly from 9.1 hours in December to 15.3 hours in June - showing the mark of mid-latitude locations with marked seasonality.
The best time to visit West Allis
Visitors interested in warm weather conditions might find the months between June and August to be ideal for a visit. During this period, the average high temperatures range from 70.5°F (21.4°C) to 77.9°F (25.5°C). These months also have the longest daylight hours, averaging over 14 hours per day. Additionally, the humidity is relatively lower compared to cooler months, and rainfall is usually followed by sunshine, providing fresh, enjoyable weather.The worst time to visit West Allis
January has the harshest weather with an average high temperature of 26.1°F (-3.3°C), and low temperatures dropping to an icy 16.2°F (-8.8°C). Snowfall during this month reaches 3.03" (77mm) on average, and daylight is at a yearly low with only 9.4 hours. Moreover, January also witnesses the highest annual humidity at 85%, contributing to a wind chill effect that can make the temperature feel even colder.Spring weather in West Allis
Spring in West Allis, encompassing March to May, witnesses a gradual rise in temperatures from freezing to more tolerable averages. March commences with high temperatures around 40.3°F (4.6°C), which gradually increase to 61.9°F (16.6°C) by May. Concurrently, low temperatures rise from 29.7°F (-1.3°C) to 47.8°F (8.8°C). Rainfall also sees a marked increase in spring, jumping from 1.06" (27mm) in March to 2.2" (56mm) in May. Snowfall diminishes and usually ceases by the end of April. It's during this season that West Allis begins to transition from bleak winter into a flourishing landscape filled with rebudding plant life.Summer weather in West Allis
June through August is the summer season in West Allis. Regular high temperatures fall between 70.5°F (21.4°C) and 77.9°F (25.5°C), styling this season as the warmest period of the year. Low temperatures also remain warm, fluctuating from 57.4°F (14.1°C) in June to 64.2°F (17.9°C) in July. Rainfall peaks in June at 2.56" (65mm), followed by a moderate decrease during July and August. Daylight hours are longest in this season, with June having the record 15.3 hours. Visitor activities during summer can include everything from outdoor festivals to nature walks.Autumn weather in West Allis
Autumn, stretching from September to November, brings a cooling trend. High temperatures descend from a warm 70.5°F (21.4°C) in September to a chilled 43.7°F (6.5°C) by November. Low temperatures follow a similar path, plunging from 57.2°F (14°C) in September to 33.6°F (0.9°C) in November. Rainfall also increases slightly in this season, reaching 1.93" (49mm) in October. The first traces of snow may surface by November. Autumn in West Allis paints the city in a burst of vibrant fall colors, making it a picturesque time for witness.Winter weather in West Allis
The winter season in West Allis, typified by December to February, displays the coldest conditions of the year. High temperatures drop to 26.1°F (-3.3°C) in January and February, amplifying the winter chill. Low temperatures can plummet to 16.2°F (-8.8°C). Snowfall is prevalent during this time, with January recording the highest level at 3.03" (77mm). Winters in West Allis are genuinely reflective of the Dfb climate, showcasing white landscapes and a sparkly, frosted city under the Wisconsin winter sky.Weather in January
January in West Allis, Wisconsin, is characterized by snowy weather conditions with 11.6 days of snowfall amounting to 3.03" (77mm). The frosty temperatures and high levels of humidity often contribute to the formation of ice. This icy weather creates a picturesque winter scene, though it requires residents to bundle up tightly against the cold. Weather in January »Weather in February
The air in West Allis softens slightly in February as the snowy conditions decrease compared to January, creating a relaxing and serene atmosphere for residents. However, the persistent cold weather still necessitates the need for cozy clothing layers. Weather in February »Weather in March
As spring approaches, March sees a considerable increase in temperatures from 16.2°F (-8.8°C) in February to 29.7°F (-1.3°C), signaling a shift in weather patterns in West Allis. With the arrival of spring, the environment transforms, and the snow begins to melt away. Weather in March »Weather in April
April brings a noticeable change in West Allis, as spring fully asserts itself. The snowy weather of the previous months gives way to showers, as rainfall increases noticeably to 2.13" (54mm). On warming days, the cityscape fills with the vibrant colors of blossoming plants and flowers. Weather in April »Weather in May
In May, West Allis truly moves into spring, with warming temperatures welcoming the comprehensive range of outdoor activities the city provides. Sunlight increases, allowing the fresh green foliage to glow beautifully under clear skies. Weather in May »Weather in June
June ushers in the peak of pastoral beauty in West Allis, with sunlight bathing the city in summer warmth. The increased daylight hours, coupled with an average of 13.5 days of rainfall, hydrate the greenery, maintaining the city's vibrancy. Weather in June »Weather in July
Equipped with the highest temperatures of the year at 77.9°F (25.5°C), July is the perfect month to experience the summers of West Allis. Long, sunny days combined with the lowest cloud cover of the year provide a pleasant atmosphere for outdoor activities. Weather in July »Weather in August
August continues the warm trend of July in West Allis, offering high temperatures and ample sunshine. This month is excellent for adventurous trail exploration, enlightening seasonal events, and leisurely picnics in city parks. The rainfall slightly decreases, maintaining the greenery that adds a refreshing element in the hot summer days. Weather in August »Weather in September
September marks the cusp of fall in West Allis as temperatures start to moderate from the summer heat to a more pleasant range. The humidity also decreases, making it an ideal time for outdoor exploration and late summer barbecues. Weather in September »Weather in October
October in West Allis becomes noticeably colder as it transitions from 70.5°F (21.4°C) in September to a lower average of 57.6°F (14.2°C). The fall colors reach their zenith, creating a spectacular canvas of reds, yellows, and oranges. Weather in October »Weather in November
November signifies the advent of winter in West Allis, as the month experiences a considerable drop in temperature, with averages dipping to 43.7°F (6.5°C). Trees shed their leaves, signaling a change in the natural scenery as winter takes a foothold. Weather in November »Weather in December
December in West Allis is a winter wonderland with the landscape blanketed in a nearly 2" (51mm) layer of snow. As winter fully settles in, the frosty weather creates crystal-clear skies and crisp, clean air. Beautiful scenes of icicles adorning trees and buildings become common, offering gorgeous opportunities for winter photography. Weather in December »Updated: Aug 7, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
West Allis's coldest month, January, registers temperatures that range from a high of 26.1°F (-3.3°C) to a low of 16.2°F (-8.8°C).
The most humid month is January, with an average relative humidity of 85%.
In West Allis, during the entire year, the rain falls for 126 days and collects up to 19.37" (492mm) of precipitation.
Months with snowfall are January through April, October through December.
The month with the most snowfall is January, when snow falls for 11.6 days and typically aggregates up to 3.03" (77mm) of snow.
Throughout the year, there are 43.6 snowfall days, and 11.22" (285mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 3.5h of sunshine.
The months with the lowest UV index in West Allis are January and December, with an average maximum UV index of 1.
The months with the least rainfall are February and December Rain falls for 3.3 days and accumulates 0.83" (21mm) of rain.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
May through September are months without snowfall.
The month with the longest days is June, with an average of 15h and 18min of daylight.
The month of July sees the average highest temperatures, reaching 77.9°F (25.5°C) at the peak and 64.2°F (17.9°C) at the low.
July is the month with the most rainfall. Rain falls for 15.9 days and accumulates 2.56" (65mm) of precipitation.
The months with the most sunshine are July and August, with an average of 10.3h of sunshine.
The month with the highest UV index is July, with an average maximum UV index of 6.
The least humid month is October, with an average relative humidity of 75%.
With an average of 9h and 6min of daylight, December has the shortest days of the year.
Average temperature
West Allis, WI
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (26.1°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure
West Allis, WI
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.08"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
West Allis, WI
- Average wind speed in January:
11.4mph - Average wind speed in February:
11.1mph - Average wind speed in March:
10.2mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.2mph - Average wind speed in September:
8.5mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.7mph - Average wind speed in December:
10.7mph
The windiest month (with the highest average wind speed) is January (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity
West Allis, WI
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall
West Allis, WI
- Average rainfall in January:
0.91" - Average rainfall in February:
0.83" - Average rainfall in March:
1.06" - Average rainfall in April:
2.13" - Average rainfall in May:
2.2" - Average rainfall in June:
2.17"
- Average rainfall in July:
2.56" - Average rainfall in August:
2.17" - Average rainfall in September:
1.54" - Average rainfall in October:
1.93" - Average rainfall in November:
1.06" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is July (2.56").
The driest months (with the least rainfall) are February and December (0.83").
Average rainfall days
West Allis, WI
- Average rainfall days in January:
3.6 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
9.7 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
13.5 days
- Average rainfall days in July:
15.9 days - Average rainfall days in August:
14.9 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (3.3 days).
Average snowfall
West Allis, WI
The month with the highest snowfall is January (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
West Allis, WI
- Average snowfall days in January:
11.6 days - Average snowfall days in February:
9.6 days - Average snowfall days in March:
6.2 days - Average snowfall days in April:
2.1 days - Average snowfall days in May:
0.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.6 days - Average snowfall days in November:
4.5 days - Average snowfall days in December:
8.8 days
The month with the highest number of snowfall days is January (11.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
West Allis, WI
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
3h and 30min - Average sunshine in February:
3h and 42min - Average sunshine in March:
5h and 48min - Average sunshine in April:
7h and 18min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 18min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 18min - Average sunshine in November:
4h and 48min - Average sunshine in December:
3h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
West Allis, WI
- Average sunshine days in January:
15.2 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
14 days - Average sunshine days in June:
13.8 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
12.7 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
17.2 days
The month with the most sunshine days is November (17.4 days).
The months with the least sunshine days are July and August (12.7 days).
Average UV index
West Allis, WI
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
West Allis, WI
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility
West Allis, WI
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
