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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 Saint David, Illinois, with an average temperature varying between 19.4°F (-7°C) and 31.5°F (-0.3°C). January, with average temperatures reaching a high of 31.5°F (-0.3°C) and a low of 19.4°F (-7°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Saint David, is an icy month, with temperature in the range of an average low of 23°F (-5°C) and an average high of 36.3°F (2.4°C). Stepping into February, Saint David records an average high-temperature of an icy 36.3°F (2.4°C), almost consistent with January. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Saint David, Illinois, with an average temperature varying between 49.6°F (9.8°C) and 34.3°F (1.3°C). In Saint David, the onset of March comes with an increased average high-temperature, moving from February's icy 36.3°F (2.4°C) to a chilly 49.6°F (9.8°C). Weather in March »
Weather in April
April in Saint David, Illinois, is a comfortable spring month, with an average temperature ranging between min 44.2°F (6.8°C) and max 61.3°F (16.3°C). April's arrival sees a rise in the average high-temperature, jumping from March's frosty 49.6°F (9.8°C) to an enjoyable 61.3°F (16.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Saint David, Illinois, with an average temperature ranging between min 55°F (12.8°C) and max 72°F (22.2°C). As Saint David transitions into May, a rise in the average high-temperature is observed, moving from a comfortable 61.3°F (16.3°C) in April to an agreeable 72°F (22.2°C). Weather in May »
Weather in June
June, the first month of the summer in Saint David, is a warm month, with an average temperature varying between 63.7°F (17.6°C) and 80.8°F (27.1°C). Saint David's June weather indicates a minor ascent in high-temperatures, adjusting from a pleasant 72°F (22.2°C) in May to a warm 80.8°F (27.1°C). Weather in June »
Weather in July
July, like June, in Saint David, Illinois, is a moderately hot summer month, with an average temperature varying between 82.8°F (28.2°C) and 65.8°F (18.8°C). In Saint David, the month of July is known for its highest average temperatures, reaching a high of 82.8°F (28.2°C) and a low of 65.8°F (18.8°C). The heat index in July is estimated at a hot 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Saint David, Illinois, with an average temperature varying between 82°F (27.8°C) and 63.7°F (17.6°C). Saint David, Illinois, in August witnesses an average high-temperature of a still moderately hot 82°F (27.8°C), indicating a slight variation from July's 82.8°F (28.2°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Saint David, Illinois, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 76.6°F (24.8°C). Start of September brings a slight shift in the average high-temperature, dipping a bit from August's moderately hot 82°F (27.8°C) to a still warm 76.6°F (24.8°C). Weather in September »
Weather in October
October, like September, in Saint David, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 63°F (17.2°C) and 46.6°F (8.1°C). Saint David's progression into October involves a drop in the average high-temperature, receding from a moderately hot 76.6°F (24.8°C) in September to a refreshing 63°F (17.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Saint David, Illinois, with temperature in the range of an average low of 35.1°F (1.7°C) and an average high of 49.1°F (9.5°C). November brings a minor decrease, with the average high-temperature reducing from a refreshing 63°F (17.2°C) in October to a frosty 49.1°F (9.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Saint David, Illinois, with an average temperature ranging between max 37°F (2.8°C) and min 26.4°F (-3.1°C). December's onset brings a reduction in the average high-temperature, from a chilly 49.1°F (9.5°C) in November to a cold 37°F (2.8°C). Weather in December »
Updated: Jun 9, 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 time of the year is the coldest in Saint David?
January stands out as Saint David's coldest month, with an average high-temperature of 31.5°F (-0.3°C) and a low-temperature of 19.4°F (-7°C).
How much does it rain?
In Saint David, Illinois, during the entire year, the rain falls for 131.7 days and collects up to 22.48" (571mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 9.4 days and typically aggregates up to 3.35" (85mm) of snow.
How much does it snow?
Throughout the year, there are 27.4 snowfall days, and 9.21" (234mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.1h of sunshine.
What is the month with the lowest UV index in Saint David?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST)?
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.
What is the rainiest month?
May is the month with the most rainfall. Rain falls for 16.7 days and accumulates 3.23" (82mm) of precipitation.
When it does not snow?
In Saint David, snow does not fall in May through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What are the months with the most sunshine?
June and July, with an average of 10.1h of sunshine, are months with the most sunshine.
What are the months with the highest UV index in Saint David?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What month is the hottest?
July, with an average high of 82.8°F (28.2°C) and a low of 65.8°F (18.8°C), signifies the warmest month of the year.
What is the most humid month?
With an average relative humidity of 83%, July is the most humid month in Saint David, Illinois.
What is the least humid month?
The least humid month is October, with an average relative humidity of 71%.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 6.5 days and typically collects 0.94" (24mm) of precipitation.
What is the month with the shortest days in Saint David?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Saint David, IL
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure
Saint David, 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:
29.93"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:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"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
Saint David, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.2mph - 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 (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity
Saint David, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Saint David, IL
- Average rainfall in January:
1.02" - Average rainfall in February:
1.1" - Average rainfall in March:
1.65" - Average rainfall in April:
2.6" - Average rainfall in May:
3.23" - Average rainfall in June:
2.68"
- Average rainfall in July:
2.17" - Average rainfall in August:
1.89" - Average rainfall in September:
2.09" - Average rainfall in October:
1.89" - Average rainfall in November:
1.22" - Average rainfall in December:
0.94"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is December (0.94").
Average rainfall days
Saint David, IL
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.7 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
16.7 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
11 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (4.7 days).
Average snowfall
Saint David, IL
The month with the highest snowfall is January (3.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Saint David, IL
- Average snowfall days in January:
9.4 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
1 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:
0.1 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Saint David, 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 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:
9h and 5min - 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 18min).
- Average sunshine in January:
4h and 1min - 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 0min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Saint David, IL
- Average sunshine days in January:
17.9 days - Average sunshine days in February:
17 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
14.6 days - Average sunshine days in May:
12.5 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
14.6 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
20 days - Average sunshine days in December:
20.4 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index
Saint David, 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
Saint David, IL
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility
Saint David, 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).
Saint David, Illinois, USA
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