Climate and monthly weather forecastLombard, IL
Climate and monthly weather forecast
The climate of Lombard
Located in the heart of Illinois, Lombard sits within a Humid Continental climate zone, classified as Dfa according to the Köppen climate classification system. This implies a hot summer without any dry season throughout the year. The annual weather pattern features significant seasonality, with wide temperature swings, variable humidity, and an array of precipitation types.A look at the prevailing climate parameters reveals that temperatures in Lombard bounce between augmenting highs and dipping lows. The highest temperature tops around 82.2°F (27.9°C) during the peak summer while the harshest winter brings temperatures down to a minimum of 17.1°F (-8.3°C).
The pattern of relative humidity is fairly stationary throughout the year, generally sitting comfortably between 72% to 82%. On the aspect of precipitation, rainfall averages vary from 1.14" (29mm) to 3.07" (78mm) per month. The complementing snowfall adds up to a summit of 3.62" (92mm) during the winter months. However, the snow blanketing completely recedes from June to September, offering a snow-free span.
The best time to visit Lombard
Considering the temperature, rainfall, and daylight hours, the most agreeable time to visit Lombard would be from May to September. During these months, the temperatures hover between a pleasant 68.7°F (20.4°C) to 81.1°F (27.3°C) and both the rainfall and snowfall are relatively moderate. Additionally, an extended span of daylight that averages from 14.6 hours to 15.2 hours provides ample opportunity to enjoy outdoor activities and events.The worst time to visit Lombard
Winter, in general, is a challenging time to visit Lombard due to the harsh weather conditions. From December to February, temperatures drop to an average low range from 17.1°F (-8.3°C) to 32.5°F (0.3°C). Also, this period sees the highest snowfall of the year averaging between 2.48" (63mm) to 3.62" (92mm). The relative humidity is also at its highest and daylight is at its shortest, averaging around 9.5 hours.Spring weather in Lombard
Spring in Lombard unfolds from March to May, with a major escalation in the temperature from a maximum of 45.1°F (7.3°C) in March to a warm 68.7°F (20.4°C) in May. Over this period, humidity stays consistent around 75%, while rainfall rolls into a higher gear, escalating from an average of 1.42" (36mm) to 3.07" (78mm).Summer weather in Lombard
Summer spans from June to August, with temperatures peaking at 82.2°F (27.9°C) in July. Rainfall dips in this period from 2.72" (69mm) to 2.68" (68mm), while a complete absence of snowfall is witnessed. The days in this season are longest, averaging between 14.6 hours to 15.2 hours of daylight, providing plenty of sunshine for outdoor activities.Autumn weather in Lombard
Autumn unravels in Lombard from September through to November. During this period, temperatures undergo a significant dip, from an inviting 74.1°F (23.4°C) in September to a chilling 45.7°F (7.6°C) in November. Correspondingly, rainfall also witnesses a downturn, from 1.61" (41mm) in September to 1.22" (31mm) in November.Winter weather in Lombard
Winter stretches from December to February, taking Lombard into a season of sharp chill. Temperatures drop between an average high of 34.5°F (1.4°C) and low of 17.1°F (-8.3°C) along with significant snowfall measuring from 3.35" (85mm) to 2.48" (63mm). The days also shorten considerably with an average daylight duration varying between 9.2 hours to 10.6 hours. As one would expect, this is not the optimal time for outdoor ventures.Weather in January
In Lombard, Illinois, January sets the tone of winter with cool temperatures and mostly overcast skies. The cold season is ushered in fully, differing from the chilly month of December in its significantly lower temperatures, with a high of 28.6°F (-1.9°C) and a low of 17.1°F (-8.3°C). Weather in January »Weather in February
As in January, Lombard experiences a wintery mix of cold, cloudy conditions in February. A small increase in temperatures marking the end of the harshest winter conditions is anticipated from 28.6°F (-1.9°C) to 32.5°F (0.3°C) as the highest for the month. Weather in February »Weather in March
In Lombard, the advent of spring is heralded by March's gradually warming temperatures. More sunlit days pierce the monotony of the colder months, making the weather outlook more pleasant than in February. The most significant transition is in temperatures as they range from 45.1°F (7.3°C) high up from February’s 32.5°F (0.3°C). Weather in March »Weather in April
Lombard's shift towards spring becomes more evident in April, as temperatures rise and days lengthen. Compared to March, April showcases more daylight hours, contributing to the overall warm and inviting climate. A remarkable increase in rainfall to 2.68" (68mm) sets this month apart, creating damp conditions and aiding in boosting the city's lush vegetation. Weather in April »Weather in May
The pleasantly warm May weather in Lombard offers ideal conditions for outdoor pursuits. It's a significant leap from April, with temperatures averaging 68.7°F (20.4°C) at their highest, signifying the official dawn of the warm season. Weather in May »Weather in June
June sees Lombard fully warmed up and ready to welcome summer, offering brighter and longer days compared to May. The appealing weather conditions are characterized by comfortable temperatures, plenty of sunshine, and lower wind speeds. Weather in June »Weather in July
July in Lombard represents the zenith of summer with the warmest weather conditions of the year. Compared to June, there is a significant rise in heat levels, coupled with the highest UV index rating of 6. The hottest temperatures are witnessed in this month, soaring up to 82.2°F (27.9°C). Weather in July »Weather in August
In August, Lombard experiences the last full month of summer with a straightforward transition from July's high heat levels. The weather remains warm, though marginally less hot than the July peak. Even though the maximum temperature comes down to 81.1°F (27.3°C) from July's high 82.2°F (27.9°C), it still encourages plenty of outdoor activities. Weather in August »Weather in September
By September, Lombard starts witnessing the first signs of the fall season; a decrease in temperatures and extended periods of daylight are the order of the day. Compared with August, September harbors less intensity in summer’s heat with temperatures dropping to 74.1°F (23.4°C). Weather in September »Weather in October
With fall in full swing, October's temperate climate in Lombard suits many, serving up generous doses of fall foliage and allowing for a multitude of outdoor activities. Cooler temperature gradients from 74.1°F (23.4°C) in September to a moderate high of 60.6°F (15.9°C) are noticeable this month. Weather in October »Weather in November
Lombard's November weather introduces an unmistakable chill, signifying the arrival of the early winter. The sharp drop in temperatures from 60.6°F (15.9°C) in October to the 45.7°F (7.6°C) November high marks the month as the harbinger of colder days ahead. Weather in November »Weather in December
The culmination of the year sees Lombard, Illinois, in the firm grip of winter. The chilling weather continues from November's cool down, with temperatures averaging at a high of 34.5°F (1.4°C). Snowfall becomes an integral part of December's weather pattern, blanketing the city in a typical winter spectacle. Weather in December »Updated: Jul 21, 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
Lombard's coldest month, January, generally records average temperatures ranging from a high of 28.6°F (-1.9°C) to a low of 17.1°F (-8.3°C).
The months with the highest humidity are January and February, with an average relative humidity of 82%.
In Lombard, during the entire year, the rain falls for 147.3 days and collects up to 23.86" (606mm) of precipitation.
Months with snowfall are January through May, October through December.
Throughout the year, there are 46.3 snowfall days, and 14.25" (362mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 3.7h of sunshine.
The months with the lowest UV index in Lombard are January and December, with an average maximum UV index of 1.
February is the month with the most snowfall. Snow falls for 10.8 days and accumulates 3.62" (92mm) of snow.
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.
The month with the most rainfall is May, when the rain falls for 16.7 days and typically aggregates up to 3.07" (78mm) of precipitation.
In Lombard, snow does not fall in June through September.
The month with the longest days is June, with an average of 15h and 12min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Lombard.
July temperatures tend to peak at an average high of 82.2°F (27.9°C) and dip to a low of 66.2°F (19°C).
The months with the most sunshine are July and August, with an average of 9.9h of sunshine.
October is the least humid month, with an average relative humidity of 72%.
The month with the least rainfall is December, when the rain falls for 7.5 days and typically collects 1.14" (29mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Lombard, IL
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (28.6°F).
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure
Lombard, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"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:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Lombard, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.5mph - Average wind speed in May:
8.1mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.1mph - Average wind speed in September:
7.1mph - Average wind speed in October:
8.7mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9.1mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
Lombard, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Lombard, IL
- Average rainfall in January:
1.3" - Average rainfall in February:
1.26" - Average rainfall in March:
1.42" - Average rainfall in April:
2.68" - Average rainfall in May:
3.07" - Average rainfall in June:
2.72"
- Average rainfall in July:
2.76" - Average rainfall in August:
2.68" - Average rainfall in September:
1.61" - Average rainfall in October:
2.01" - Average rainfall in November:
1.22" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days
Lombard, IL
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
5.5 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
16.1 days - Average rainfall days in May:
16.7 days - Average rainfall days in June:
16.5 days
- Average rainfall days in July:
17.7 days - Average rainfall days in August:
16.1 days - Average rainfall days in September:
13.2 days - Average rainfall days in October:
12.1 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
7.5 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is February (5.5 days).
Average snowfall
Lombard, IL
- Average snowfall in January:
3.35" - Average snowfall in February:
3.62" - Average snowfall in March:
1.18" - Average snowfall in April:
2.13" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Lombard, IL
- Average snowfall days in January:
12.4 days - Average snowfall days in February:
10.8 days - Average snowfall days in March:
6.3 days - Average snowfall days in April:
2.2 days - Average snowfall days in May:
0.1 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:
0.3 days - Average snowfall days in November:
3.8 days - Average snowfall days in December:
10.4 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Lombard, 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 42min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 54min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 0min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Lombard, IL
- Average sunshine days in January:
14.4 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
10.4 days - Average sunshine days in May:
11.5 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
10.2 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
15.2 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (10.2 days).
Average UV index
Lombard, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Lombard, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility
Lombard, IL
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
