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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 San Jose, Illinois, with an average temperature fluctuating between 19.8°F (-6.8°C) and 31.5°F (-0.3°C). The lowest temperatures are recorded in January, with averages reaching a high of 31.5°F (-0.3°C) and a low of 19.8°F (-6.8°C). Weather in January »
Weather in February
The last month of the winter, February, is a cold month in San Jose, Illinois, with an average temperature varying between 36.3°F (2.4°C) and 23.4°F (-4.8°C). February begins with an average high-temperature of an icy 36.3°F (2.4°C), reflecting close similarity to the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in San Jose, Illinois, with an average temperature varying between 34.5°F (1.4°C) and 49.6°F (9.8°C). As San Jose welcomes March, the average high-temperature sees a rise, transitioning from a wintry 36.3°F (2.4°C) in February to a chilly 49.6°F (9.8°C). Weather in March »
Weather in April
April in San Jose, Illinois, is an enjoyable spring month, with temperature in the range of an average high of 61.5°F (16.4°C) and an average low of 44.6°F (7°C). As March gives way to April, the average high-temperature displays an increase, moving from a chilly 49.6°F (9.8°C) to a refreshing 61.5°F (16.4°C). Weather in April »
Weather in May
May, the last month of the spring in San Jose, is a pleasant month, with an average temperature fluctuating between 72.1°F (22.3°C) and 55.8°F (13.2°C). May indicates a change in the average high-temperature, moving up from a refreshing 61.5°F (16.4°C) in April to a pleasant 72.1°F (22.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in San Jose, Illinois, with temperature in the range of an average high of 80.6°F (27°C) and an average low of 63.9°F (17.7°C). San Jose in June experiences a slight uptick in the average high-temperature, adjusting from May's agreeable 72.1°F (22.3°C) to a warm 80.6°F (27°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in San Jose, Illinois, with an average temperature fluctuating between 65.3°F (18.5°C) and 82°F (27.8°C). The warmest time of the year is July, with temperatures averaging a high of 82°F (27.8°C) and a low of 65.3°F (18.5°C). July's heat index is calculated to be a hot 89.6°F (32°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in San Jose, Illinois, with an average temperature fluctuating between 81.1°F (27.3°C) and 63.5°F (17.5°C). August observes an average high-temperature of a still warm 81.1°F (27.3°C), marking an insignificant difference from July's 82°F (27.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in San Jose, Illinois, with an average temperature ranging between max 76.5°F (24.7°C) and min 57.9°F (14.4°C). September welcomes an average high-temperature of a still moderately hot 76.5°F (24.7°C), not much different from the preceding month. Weather in September »
Weather in October
October, like September, in San Jose, Illinois, is another enjoyable autumn month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 63.1°F (17.3°C). The shift from September to October corresponds with a decrease in the average high-temperature, down to an enjoyable 63.1°F (17.3°C) from a moderately hot 76.5°F (24.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in San Jose, Illinois, with an average temperature varying between 35.2°F (1.8°C) and 48.9°F (9.4°C). The onset of November introduces a moderate change in San Jose's weather, with average high-temperatures falling from October's enjoyable 63.1°F (17.3°C) to a frosty 48.9°F (9.4°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in San Jose, Illinois, with temperature in the range of an average high of 36.9°F (2.7°C) and an average low of 26.4°F (-3.1°C). The arrival of December signals a shift in temperature, down from a chilly 48.9°F (9.4°C) in November to a wintry 36.9°F (2.7°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in San Jose?
In San Jose, January is known for its average lowest temperatures, reaching a high of 31.5°F (-0.3°C) and a low of 19.8°F (-6.8°C).
How many days does it rain in San Jose?
Throughout the year, in San Jose, there are 131.4 rainfall days, and 20.08" (510mm) of precipitation is accumulated.
When does it snow in San Jose?
January through April, November and December are months with snowfall in San Jose, Illinois.
When does it snow the most in San Jose?
January is the month with the most snowfall in San Jose. Snow falls for 8.4 days and accumulates 2.87" (73mm) of snow.
How much does it snow in San Jose?
Throughout the year, in San Jose, there are 25.8 snowfall days, and 8.66" (220mm) of snow is accumulated.
What is the month with the least sunshine in San Jose?
With an average of 4h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in San Jose?
The months with the lowest UV index in San Jose, Illinois, are January, February, November and December, with an average maximum UV index of 2.
What is the driest month in San Jose?
The month with the least rainfall in San Jose is February, when the rain falls for 5.1 days and typically collects 1.02" (26mm) of precipitation.
When is Daylight Saving Time (DST) in San Jose?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in San Jose, 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 San Jose?
May is the month with the most rainfall. Rain falls for 17.7 days and accumulates 2.83" (72mm) of precipitation.
When it does not snow in San Jose?
In San Jose, snow does not fall in May through October.
When are the longest days in San Jose?
June has the longest days of the year, with an average of 15h and 0min of daylight.
What month has the most sunshine in San Jose?
The month with the most sunshine in San Jose is June, with an average of 10.2h of sunshine.
When is the highest UV index in San Jose?
June through August, with an average maximum UV index of 6, are months with the highest UV index in San Jose.
What is the warmest month in San Jose?
July, recognised by an average high temperature of 82°F (27.8°C) and a low of 65.3°F (18.5°C), is San Jose's warmest month.
What is the most humid month in San Jose?
July is the most humid month in San Jose, with an average relative humidity of 84%.
What is the least humid month in San Jose?
The least humid month in San Jose is October, with an average relative humidity of 71%.
What is the month with the shortest days in San Jose?
December has the shortest days of the year in San Jose, with an average of 9h and 24min of daylight.
Average temperature
San Jose, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
San Jose, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"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:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
San Jose, IL
- Average wind speed in January:
10.4mph - 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:
8.8mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.3mph - Average wind speed in November:
9.9mph - 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 (6.4mph).
Average humidity
San Jose, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall
San Jose, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
1.02" - Average rainfall in March:
1.57" - Average rainfall in April:
2.28" - Average rainfall in May:
2.83" - Average rainfall in June:
2.28"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.61" - Average rainfall in September:
1.57" - Average rainfall in October:
1.61" - Average rainfall in November:
1.26" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days
San Jose, IL
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
15.5 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.3 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
San Jose, IL
The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
San Jose, IL
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
6.4 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.5 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:
0.2 days - Average snowfall days in November:
1.7 days - Average snowfall days in December:
5.4 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
San Jose, 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
San Jose, IL
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
16.1 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
18.8 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
20 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.8 days).
Average UV index
San Jose, 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, February, November and December (UV index 2).
Average cloud cover
San Jose, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
San Jose, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
San Jose, Illinois, USA
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