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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is another subzero cold winter month in Barstow, Illinois, with an average temperature fluctuating between 28.2°F (-2.1°C) and 15.4°F (-9.2°C). January proves to be the coldest month, recording an average maximum temperature of 28.2°F (-2.1°C) and a minimum temperature of 15.4°F (-9.2°C). Weather in January »
Weather in February
February, the last month of the winter in Barstow, is a cold month, with an average temperature varying between 19.6°F (-6.9°C) and 32.7°F (0.4°C). The onset of February manifests an average high-temperature of a wintry 32.7°F (0.4°C), demonstrating a minor variation from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Barstow, is a frosty month, with an average temperature ranging between max 46.8°F (8.2°C) and min 32°F (0°C). March's arrival sees a rise in the average high-temperature, jumping from February's cold 32.7°F (0.4°C) to a frosty 46.8°F (8.2°C). Weather in March »
Weather in April
April in Barstow, Illinois, is a moderate spring month, with an average temperature varying between 42.4°F (5.8°C) and 59°F (15°C). The onset of April brings a rise in the average high-temperature, elevating from a frosty 46.8°F (8.2°C) in March to a mild 59°F (15°C). Weather in April »
Weather in May
May, the last month of the spring in Barstow, is an agreeable month, with an average temperature ranging between min 53.4°F (11.9°C) and max 70.3°F (21.3°C). Noticing a change, the average high-temperature during May moves from April's refreshing 59°F (15°C) to a pleasant 70.3°F (21.3°C). Weather in May »
Weather in June
June, the first month of the summer in Barstow, is a moderately hot month, with an average temperature ranging between min 61.9°F (16.6°C) and max 79°F (26.1°C). With the transition into June, Barstow experiences a subtle uplift in average high-temperatures, adjusting from an agreeable 70.3°F (21.3°C) in May to a warm 79°F (26.1°C). Weather in June »
Weather in July
July, like June, in Barstow, Illinois, is a moderately hot summer month, with an average temperature varying between 81.7°F (27.6°C) and 64.8°F (18.2°C). July is the warmest month, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 64.8°F (18.2°C). July's mean heat index is appraised at a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Barstow, is another warm month, with an average temperature fluctuating between 62.4°F (16.9°C) and 80.6°F (27°C). August denotes a minimal variation in the average high-temperature to a still moderately hot 80.6°F (27°C) from July's 81.7°F (27.6°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Barstow, Illinois, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 75.4°F (24.1°C). September brings a marginal elevation to a still warm 75.4°F (24.1°C) from August's 80.6°F (27°C) in Barstow's average high-temperatures. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Barstow, Illinois, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 61.3°F (16.3°C). Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 75.4°F (24.1°C) to a comfortable 61.3°F (16.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Barstow, is also a frosty month, with temperature in the range of an average low of 33.3°F (0.7°C) and an average high of 46.9°F (8.3°C). November's onset is marked by a clear temperature decrease, falling from a refreshing 61.3°F (16.3°C) in October to a chilly 46.9°F (8.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Barstow, Illinois, with an average temperature varying between 23.9°F (-4.5°C) and 34.5°F (1.4°C). December comes with a drop in the average high-temperature, falling from November's chilly 46.9°F (8.3°C) to an icy 34.5°F (1.4°C). Weather in December »
Updated: Feb 12, 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
What is the coldest time of year in Barstow?
January tends to be the coldest month, with temperatures averaging a daily high of 28.2°F (-2.1°C) and a low of 15.4°F (-9.2°C).
What are the most humid months in Barstow?
January and July, with an average relative humidity of 83%, are most humid months.
How much does it rain in Barstow?
In Barstow, during the entire year, the rain falls for 99.4 days and collects up to 9.57" (243mm) of precipitation.
When does it snow in Barstow?
January through April, September through December are months with snowfall.
What is the snowiest month in Barstow?
The month with the most snowfall is January, when snow falls for 7.2 days and typically aggregates up to 1.26" (32mm) of snow.
How much does it snow in Barstow?
In Barstow, Illinois, during the entire year, snow falls for 24.5 days and aggregates up to 4.09" (104mm) of snow.
What is the month with the least sunshine in Barstow?
With an average of 3.9h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Barstow?
With an average maximum UV index of 1, January is the month with the lowest UV index in Barstow, Illinois.
When is Daylight Saving Time (DST) in Barstow?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Barstow, 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.
What is the wettest month in Barstow?
The month with the most rainfall is May, when the rain falls for 13.4 days and typically aggregates up to 1.61" (41mm) of precipitation.
When it does not snow in Barstow?
In Barstow, snow does not fall in May through August.
When are the longest days in Barstow?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What is the hottest time of year in Barstow?
Barstow's July weather, marked by an average high temperature of 81.7°F (27.6°C) and an average low temperature of 64.8°F (18.2°C), is the warmest in the year.
What month has the most sunshine in Barstow?
The month with the most sunshine in Barstow, Illinois, is July, with an average of 10.1h of sunshine.
When is the highest UV index in Barstow?
July is the month with the highest UV index, with an average maximum UV index of 6.
What is the least humid month in Barstow?
With an average relative humidity of 71%, October is the least humid month in Barstow.
What is the driest month in Barstow?
December is the month with the least rainfall in Barstow, Illinois. Rain falls for 4.1 days and accumulates 0.35" (9mm) of precipitation.
What is the month with the shortest days in Barstow?
December has the shortest days of the year in Barstow, with an average of 9h and 12min of daylight.
Average temperature
Barstow, IL
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure
Barstow, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Barstow, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity
Barstow, IL
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Barstow, IL
- Average rainfall in January:
0.43" - Average rainfall in February:
0.39" - Average rainfall in March:
0.63" - Average rainfall in April:
1.02" - Average rainfall in May:
1.61" - Average rainfall in June:
1.26"
- Average rainfall in July:
1.18" - Average rainfall in August:
0.71" - Average rainfall in September:
0.75" - Average rainfall in October:
0.71" - Average rainfall in November:
0.51" - Average rainfall in December:
0.35"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days
Barstow, IL
- Average rainfall days in January:
3.2 days - Average rainfall days in February:
3.3 days - Average rainfall days in March:
8.2 days - Average rainfall days in April:
11.8 days - Average rainfall days in May:
13.4 days - Average rainfall days in June:
13.1 days
- Average rainfall days in July:
11.2 days - Average rainfall days in August:
10.7 days - Average rainfall days in September:
6.9 days - Average rainfall days in October:
8.4 days - Average rainfall days in November:
5.1 days - Average rainfall days in December:
4.1 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).
Average snowfall
Barstow, IL
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days
Barstow, IL
- Average snowfall days in January:
7.2 days - Average snowfall days in February:
6.2 days - Average snowfall days in March:
3.1 days - Average snowfall days in April:
0.8 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:
0.1 days - Average snowfall days in October:
0.6 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Barstow, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Barstow, IL
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
19.5 days - Average sunshine days in March:
19.8 days - Average sunshine days in April:
16.7 days - Average sunshine days in May:
14.6 days - Average sunshine days in June:
14.4 days
- Average sunshine days in July:
16.2 days - Average sunshine days in August:
17.4 days - Average sunshine days in September:
20.9 days - Average sunshine days in October:
21.3 days - Average sunshine days in November:
22.1 days - Average sunshine days in December:
22.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).
Average UV index
Barstow, IL
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Barstow, IL
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Barstow, 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).
Barstow, Illinois, USA
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