Climate and monthly weather forecastNiantic, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Niantic, Illinois, is an icy winter month, with an average temperature fluctuating between 32.5°F (0.3°C) and 20.5°F (-6.4°C). January, noted for its average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 20.5°F (-6.4°C), is considered the coldest month. Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Niantic, Illinois, with an average temperature ranging between min 24.6°F (-4.1°C) and max 37.6°F (3.1°C). Niantic starts February with an average high-temperature of a still cold 37.6°F (3.1°C), a minor shift from January's 32.5°F (0.3°C). Weather in February »Weather in March
March, the first month of the spring in Niantic, is a cool month, with temperature in the range of an average high of 50°F (10°C) and an average low of 35.2°F (1.8°C). The shift from February to March is marked by an increase in the average high-temperature, moving from a wintry 37.6°F (3.1°C) to a cool 50°F (10°C). Weather in March »Weather in April
April is a comfortable spring month in Niantic, Illinois, with temperature in the range of an average low of 45.9°F (7.7°C) and an average high of 62.2°F (16.8°C). Observing a rise in April, the average high-temperature goes from March's fresh 50°F (10°C) to a comfortable 62.2°F (16.8°C). Weather in April »Weather in May
May, the last month of the spring in Niantic, is a pleasant month, with an average temperature ranging between min 56.5°F (13.6°C) and max 72.9°F (22.7°C). May's arrival sees a rise in the average high-temperature, jumping from April's comfortable 62.2°F (16.8°C) to a pleasant 72.9°F (22.7°C). Weather in May »Weather in June
June, the first month of the summer in Niantic, is a warm month, 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). The beginning of June marks a minor shift in the average high-temperature, moving from May's pleasant 72.9°F (22.7°C) to a moderately hot 80.6°F (27°C). Weather in June »Weather in July
July, like June, in Niantic, Illinois, is another warm summer month, with temperature in the range of an average low of 65.7°F (18.7°C) and an average high of 82°F (27.8°C). Niantic's temperatures peak on average in July, reaching 82°F (27.8°C) at their highest and 65.7°F (18.7°C) at their lowest. During July, the heat index is computed to be a hot 89.6°F (32°C). Weather in July »Weather in August
August, the last month of the summer in Niantic, is also a moderately hot month, with an average temperature varying between 63.9°F (17.7°C) and 81.3°F (27.4°C). The onset of August marks an average high-temperature of a still warm 81.3°F (27.4°C), hardly differing from July's 82°F (27.8°C). Weather in August »Weather in September
September, the first month of the autumn in Niantic, is also a moderately hot month, with an average temperature ranging between min 58.5°F (14.7°C) and max 77°F (25°C). September ushers in an average high-temperature of a still moderately hot 77°F (25°C), aligning closely with the preceding month. Weather in September »Weather in October
October, like September, in Niantic, Illinois, is another enjoyable autumn month, with an average temperature ranging between min 47.8°F (8.8°C) and max 63.9°F (17.7°C). With the beginning of October, the average high-temperature shows a decrease, transitioning from a moderately hot 77°F (25°C) in September to an enjoyable 63.9°F (17.7°C). Weather in October »Weather in November
November, the last month of the autumn in Niantic, is another chilly month, with an average temperature fluctuating between 36°F (2.2°C) and 49.8°F (9.9°C). In Niantic, entering November brings a temperature decrement, reducing from October's enjoyable 63.9°F (17.7°C) to a frosty 49.8°F (9.9°C). Weather in November »Weather in December
December, the first month of the winter in Niantic, is still a cold month, with temperature in the range of an average high of 38.3°F (3.5°C) and an average low of 27.5°F (-2.5°C). Observing a mild shift, the average high-temperature during December reduces from November's chilly 49.8°F (9.9°C) to a cold 38.3°F (3.5°C). Weather in December »Updated: Jul 26, 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
January, with its average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 20.5°F (-6.4°C), holds the record as the coldest month.
In Niantic, during the entire year, the rain falls for 141.8 days and collects up to 22.24" (565mm) of precipitation.
Months with snowfall are January through April, November and December.
The month with the most snowfall is January, when snow falls for 9.4 days and typically aggregates up to 2.24" (57mm) of snow.
In Niantic, Illinois, during the entire year, snow falls for 29.7 days and aggregates up to 7.13" (181mm) of snow.
With an average of 4h of sunshine, January has the least sunshine of the year.
January is the month with the lowest UV index, with an average maximum UV index of 1.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Niantic, 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 is the month with the most rainfall. Rain falls for 17 days and accumulates 2.68" (68mm) of precipitation.
May through October are months without snowfall.
The month with the longest days is June, with an average of 15h and 0min of daylight.
The month with the most sunshine is June, with an average of 10.2h of sunshine.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
The warmest period is July, when temperatures fluctuate between an average high of 82°F (27.8°C) and a low of 65.7°F (18.7°C).
July is the most humid month, with an average relative humidity of 84%.
The least humid month is October, with an average relative humidity of 70%.
The month with the least rainfall in Niantic is December, when the rain falls for 8.3 days and typically collects 1.1" (28mm) of precipitation.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Niantic, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
Niantic, IL
- Average pressure in January:
30.15"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:
29.92"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:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Niantic, 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:
7.5mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.3mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity
Niantic, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Niantic, IL
- Average rainfall in January:
1.42" - Average rainfall in February:
1.18" - Average rainfall in March:
1.61" - Average rainfall in April:
2.44" - Average rainfall in May:
2.68" - Average rainfall in June:
2.48"
- Average rainfall in July:
2.05" - Average rainfall in August:
2.13" - Average rainfall in September:
1.81" - Average rainfall in October:
2.01" - Average rainfall in November:
1.34" - Average rainfall in December:
1.1"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days
Niantic, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
17 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
10.6 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
8.3 days
The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall
Niantic, IL
The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Niantic, IL
- Average snowfall days in January:
9.4 days - Average snowfall days in February:
7.1 days - Average snowfall days in March:
2.9 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:
0.3 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
6.7 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 and August (0 days).
Average daylight / Average sunshine
Niantic, IL
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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 18min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 42min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 30min
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
Niantic, IL
- Average sunshine days in January:
16.3 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
15.7 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
13.1 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18.1 days - Average sunshine days in November:
18.9 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.8 days).
Average UV index
Niantic, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Niantic, IL
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June and September (Cloud cover 31).
Average visibility
Niantic, 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).
