Climate and monthly weather forecastEvanston, IL
Climate and monthly weather forecast
The climate of Evanston
Evanston, Illinois, USA, found itself nestled in a zone known by Köppen climate classification as Dfa, otherwise known as the Humid Continental climate type. This climatic category generally denotes a space with no significant dry season and hot summers. Geographically located in the Midwest region of the United States, Evanston experiences a wide range of weather phenomena throughout the year, with sharp contrasts observed between different seasons.Seasonal shifts in Evanston are characterized by distinct patterns in temperature, rainfall, humidity, daylight hours, and wind conditions. Monthly average temperatures fluctuate substantially, indicating the climatic diversity of the region. During the height of the summer months, peak temperatures hover around a comfortable 77°F (25°C), while in winter, values can drop as low as 20.5°F (-6.4°C).
Rainfall is another key indicator of the city's climatic patterns. On average, the region witnesses rainfall throughout the year, ranging from 1.38" (35mm) in December up to 4.49" (114mm) in June. Snowfall is mainly restricted to the winter months, confirming a notable dip in temperatures. On a similar vein, wind speed also undergoes considerable changes, peaking at 12.7mph (20.4km/h) in January and dipping to 8mph (12.9km/h) in July and August.
It is worth noting that Evanston's Humid Continental climate, devoid of any dry season, reflects high relative humidity levels throughout the year. These levels vary from 75% in autumn up to a slightly more humid 82% in January.
The best time to visit Evanston
Taking into account the various climatic factors, the most favorable time to visit Evanston may be suggested in the late spring through summer, from May to July. During this season, average temperatures waver around a comfortable zone between 59.7°F (15.4°C) to 77°F (25°C), ideal for exploring the city's cultural and natural highlights. Daylight hours hit a peak of 15.2 hours in June, offering ample time for sightseeing.The worst time to visit Evanston
In stark contrast, the winter months, particularly from December to February, might not be the optimal time for a visit to Evanston. During this season, average temperatures sink to a chilly range from 20.5°F (-6.4°C) to 31.8°F (-0.1°C). Besides, the length of daylight reduces to around 9.5 hours, while the percentage of cloud cover increases up to 62%.Spring weather in Evanston
Spring in Evanston unfolds between the end of March and the beginning of June. This season witnesses an upswing in average temperatures, gradually rising from 40.8°F (4.9°C) to 69.6°F (20.9°C). Correspondingly, average rainfall amounts increase, reaching 3.39" (86mm) in April and peaking at 4.41" (112mm) in May. Despite the increasing temperatures, wind speed maintains a steady range, fluctuating from 11.2mph (18km/h) to 9.6mph (15.4km/h).Summer weather in Evanston
Summers in Evanston, running from June through August, present an inviting weather portrait. The average temperatures during this season span from 69.6°F (20.9°C) in June to a peak of 77°F (25°C) in July and August, indicative of a hot summer. Rainfall is consistent, however, tapering down from the spring's peak to 4.49" (114mm) in June and dropping to 3.54" (90mm) by August.Autumn weather in Evanston
Autumn in Evanston witnesses a steady descent in temperatures, with averages dropping from a warm 70.7°F (21.5°C) in September to a cooler 45.9°F (7.7°C) by November. Concurrently, rainfall decreases, dropping from September's 3.11" (79mm) to reach 1.61" (41mm) by November. Wind speeds increase during this season, starting from 9.6mph (15.4km/h) in September and rising to 12.3mph (19.8km/h) in November.Winter weather in Evanston
The chill of winter in Evanston sets in between December and February. During this season, average temperatures range from 35.4°F (1.9°C) to 20.5°F (-6.4°C). December results in relatively modest snowfall of around 2.05" (52mm), while January sees the coldest temperatures and additive snowfall of up to 3.58" (91mm). The daylight duration decreases to 9.2 hours in December, making winter days noticeably shorter.Weather in January
January is generally the coldest month in Evanston, Illinois with signs of severe winter. The month gives a glimpse of chilly temperatures, shrouded skies, and sporadic snow showers. It records the highest snowfall with 3.58" (91mm) for the period. Weather in January »Weather in February
In February, Evanston witnesses a slight climb in the temperature. The sky remains mostly cloudy despite the increment in daylight hours. The snowfall figures reduce to 3.07" (78mm), hinting at a nearing departure of winter. It is a continuation of the cold season, but with lesser harshness as compared to January. Weather in February »Weather in March
March signals the beginning of Spring in Evanston with weather seamlessly transitioning between winter and spring. Visibly, the melting snow and blooming flowers paint a vibrant picture. Despite being unpredictable at times, one can expect a considerable drop in snowfall to a mere 0.94" (24mm). Weather in March »Weather in April
April is the month when Spring truly starts to show its colors in Evanston. As winter recedes, the city adorns a pleasant attire with lukewarm temperatures. The ground is generally devoid of snow, recording an insignificant 1.69" (43mm) on average. Weather in April »Weather in May
May brings the first touch of summer to Evanston, showing a significant rise in mercury levels. With pleasant temperatures, the city entices every soul to indulge in outdoor fun, be it a picnic or a long coastal walk. High rainfall of 4.41" (112mm) becomes characteristic to this month, enlivening the greenery. Weather in May »Weather in June
June marks the onset of summer season in Evanston. The daylight hours peak and the city basks in prolonged sunshine. People relish beach outings and open-air events, enjoying the warm weather. With relative humidity touching a peak of 80%, this month records the highest rainfall of 4.49" (114mm). Weather in June »Weather in July
July is typically the warmest month in Evanston, with long sunny days dominating the weather pattern. High temperatures become customary, urging people to seek solace in water bodies and air-conditioned spaces. The temperature reaches a lofty figure, with the highest at 76.8°F (24.9°C). Weather in July »Weather in August
August continues the summer spell in Evanston. There is very little fluctuation in the temperature from the preceding month. Clear skies, warm weather, and vibrant sunsets become synonymous with a typical August day. The recorded temperature hits its second peak with a maximum of 77°F (25°C), making it rather steamy. Weather in August »Weather in September
September in Evanston brings a subtle hint of an upcoming fall. People relish this transitional weather wherein the high summer heat begins to wear off. The month registers a significant drop in temperature, with the mercury bar sliding to 70.7°F (21.5°C). Weather in September »Weather in October
In October, Evanston is fully immersed in fall with a much cooler climate. This month encompasses vibrant autumn colors and shorter days. With the recorded highest temperature dropping to 58.6°F (14.8°C), the city witnesses a considerable dip in mercury levels as compared to September. Weather in October »Weather in November
November in Evanston acts as a prelude to the approaching winter. The weather continues to cool down, and overcast skies become a common sight. The temperature typically ranges around the middle, with 36.7°F (2.6°C) being the lowest recorded. Weather in November »Weather in December
December welcomes winter in Evanston. This month is marked with short days, long nights, and frosty weather. The chill in the air intensifies while snowflakes start to descend, accumulating 2.05" (52mm) through the month. Despite the harsh weather, festive celebrations spread warmth and cheer in the city. Weather in December »Updated: Aug 17, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Evanston's coldest month, January, registers temperatures that range from a high of 29.1°F (-1.6°C) to a low of 20.5°F (-6.4°C).
With an average relative humidity of 82%, January is the most humid month.
Throughout the year, there are 154.1 rainfall days, and 33.31" (846mm) of precipitation is accumulated.
Months with snowfall are January through April, October through December.
January is the month with the most snowfall. Snow falls for 11.6 days and accumulates 3.58" (91mm) of snow.
In Evanston, during the entire year, snow falls for 40.5 days and aggregates up to 12.76" (324mm) of snow.
January has the least sunshine of the year, with an average of 3.6h of sunshine.
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 most rainfall in Evanston is June, when the rain falls for 16.7 days and typically aggregates up to 4.49" (114mm) of precipitation.
With an average of 15h and 12min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
July and August, with an average of 10.6h of sunshine, are months with the most sunshine.
August is the warmest month of the year, registering average temperatures as high as 77°F (25°C) and as low as 68°F (20°C).
The least humid month is October, with an average relative humidity of 73%.
December is the month with the least rainfall. Rain falls for 7.9 days and accumulates 1.38" (35mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
With an average maximum UV index of 1, December is the month with the lowest UV index.
Average temperature
Evanston, IL
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is January (29.1°F).
The months with the highest average low temperature are July and August (68°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
Evanston, IL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Evanston, IL
- Average wind speed in January:
12.7mph - Average wind speed in February:
12.1mph - Average wind speed in March:
11.2mph - Average wind speed in April:
11.3mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.6mph
- Average wind speed in July:
8mph - Average wind speed in August:
8mph - Average wind speed in September:
9.6mph - Average wind speed in October:
11.5mph - Average wind speed in November:
12.3mph - Average wind speed in December:
11.9mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity
Evanston, IL
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Evanston, IL
- Average rainfall in January:
1.61" - Average rainfall in February:
1.54" - Average rainfall in March:
1.81" - Average rainfall in April:
3.39" - Average rainfall in May:
4.41" - Average rainfall in June:
4.49"
- Average rainfall in July:
3.7" - Average rainfall in August:
3.54" - Average rainfall in September:
3.11" - Average rainfall in October:
2.72" - Average rainfall in November:
1.61" - Average rainfall in December:
1.38"
The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is December (1.38").
Average rainfall days
Evanston, IL
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
5.6 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
17.2 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
14.9 days - Average rainfall days in October:
14.4 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
7.9 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall
Evanston, IL
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Evanston, IL
- Average snowfall days in January:
11.6 days - Average snowfall days in February:
9.3 days - Average snowfall days in March:
5.5 days - Average snowfall days in April:
2 days - Average snowfall days in May:
0 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:
0.4 days - Average snowfall days in November:
3.7 days - Average snowfall days in December:
8 days
The month with the highest number of snowfall days is January (11.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Evanston, IL
- Average daylight in January:
9h and 30min - 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 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 36min - Average sunshine in February:
3h and 48min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 42min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 48min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 36min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Evanston, IL
- Average sunshine days in January:
12 days - Average sunshine days in February:
12.8 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
11.2 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
12.6 days - Average sunshine days in September:
13 days - Average sunshine days in October:
13.5 days - Average sunshine days in November:
15.1 days - Average sunshine days in December:
15.3 days
The month with the most sunshine days is December (15.3 days).
The months with the least sunshine days are June and July (10.9 days).
Average UV index
Evanston, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Evanston, IL
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility
Evanston, IL
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).
