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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
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Crystal Lake, Iowa, with an average temperature fluctuating between 22.1°F (-5.5°C) and 9.9°F (-12.3°C). January is the month when Crystal Lake experiences its coldest temperatures, averaging a high of 22.1°F (-5.5°C) and a low of 9.9°F (-12.3°C). Weather in January »
Weather in February
February, the last month of the winter in Crystal Lake, is another freezing cold month, with an average temperature varying between 26.2°F (-3.2°C) and 13.5°F (-10.3°C). In February, Crystal Lake notes an average high-temperature of a still subzero cold 26.2°F (-3.2°C), hardly different from the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a wintry month in Crystal Lake, Iowa, with an average temperature fluctuating between 27.7°F (-2.4°C) and 41.5°F (5.3°C). As Crystal Lake steps into March, the average high-temperature increases significantly from the a subzero cold 26.2°F (-3.2°C) of February to a wintry 41.5°F (5.3°C). Weather in March »
Weather in April
April is a fresh spring month in Crystal Lake, Iowa, with an average temperature varying between 39.6°F (4.2°C) and 54.9°F (12.7°C). As April arrives, Crystal Lake's weather shows an increase in high-temperatures, moving from March's wintry 41.5°F (5.3°C) to a cool 54.9°F (12.7°C). Weather in April »
Weather in May
May, the last month of the spring in Crystal Lake, is an enjoyable month, with an average temperature fluctuating between 67.5°F (19.7°C) and 51.4°F (10.8°C). May brings a temperature increase, with average high-temperatures moving from April's cool 54.9°F (12.7°C) to a comfortable 67.5°F (19.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Crystal Lake, Iowa, with an average temperature fluctuating between 61°F (16.1°C) and 76.6°F (24.8°C). The rise of average high-temperatures is seen in June, with an increase from a refreshing 67.5°F (19.7°C) in May to a moderately hot 76.6°F (24.8°C). Weather in June »
Weather in July
July, like June, in Crystal Lake, Iowa, is another warm summer month, with an average temperature ranging between max 79.3°F (26.3°C) and min 62.6°F (17°C). Crystal Lake experiences its highest average temperatures in July, reaching a peak of 79.3°F (26.3°C) and a minimum of 62.6°F (17°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Crystal Lake, Iowa, with an average temperature ranging between min 59.9°F (15.5°C) and max 77.4°F (25.2°C). Crystal Lake's average high-temperature marks a still moderately hot 77.4°F (25.2°C) with the advent of August, closely mirroring that of the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Crystal Lake, Iowa, with temperature in the range of an average low of 53.6°F (12°C) and an average high of 72.1°F (22.3°C). The advent of September denotes an average high-temperature of a pleasant 72.1°F (22.3°C), subtly different from August's 77.4°F (25.2°C). Weather in September »
Weather in October
October, the same as September, in Crystal Lake, Iowa, is another mild autumn month, with temperature in the range of an average high of 56.7°F (13.7°C) and an average low of 42.3°F (5.7°C). Crystal Lake witnesses a significant decrease in the average high-temperature with the arrival of October, falling from September's agreeable 72.1°F (22.3°C) to a refreshing 56.7°F (13.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is also an icy month in Crystal Lake, Iowa, with temperature in the range of an average low of 30°F (-1.1°C) and an average high of 42.6°F (5.9°C). As October shifts into November, a slight alteration in temperatures is observed, with average highs reducing from a moderate 56.7°F (13.7°C) to an icy 42.6°F (5.9°C). Weather in November »
Weather in December
December, the first month of the winter in Crystal Lake, is also a subzero cold month, with an average temperature ranging between min 17.4°F (-8.1°C) and max 27.7°F (-2.4°C). Crystal Lake's transition into December is marked by a clear temperature shift, receding from an icy 42.6°F (5.9°C) in November to a subzero cold 27.7°F (-2.4°C). 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
What time of the year is the coldest?
Crystal Lake's coldest month, January, generally records average temperatures ranging from a high of 22.1°F (-5.5°C) to a low of 9.9°F (-12.3°C).
What is the most humid month?
With an average relative humidity of 89%, January is the most humid month in Crystal Lake.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 4.6 days and typically collects 0.98" (25mm) of precipitation.
How many days does it rain?
Throughout the year, there are 136.2 rainfall days, and 25.39" (645mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow in Crystal Lake?
In Crystal Lake, during the entire year, snow falls for 55.1 days and aggregates up to 22.05" (560mm) of snow.
What is the month with the least sunshine?
With an average of 3.5h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
When does it snow the most in Crystal Lake?
February is the month with the most snowfall. Snow falls for 11.3 days and accumulates 5.79" (147mm) of snow.
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?
June is the month with the most rainfall in Crystal Lake, Iowa. Rain falls for 18.8 days and accumulates 4.21" (107mm) of precipitation.
When it does not snow?
In Crystal Lake, snow does not fall in June through September.
When are the longest days in Crystal Lake?
With an average of 15h and 18min of daylight, June has the longest days of the year.
What are the months with the highest UV index?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What are the warmest months?
With average high temperatures of 79.3°F (26.3°C) and lows of 62.6°F (17°C), July is the warmest month.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 9.8h of sunshine.
What is the least humid month?
The least humid month is October, with an average relative humidity of 70%.
What is the month with the shortest days?
With an average of 9h and 0min of daylight, December has the shortest days of the year.
Average temperature
Crystal Lake, IA
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.1°F).
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure
Crystal Lake, IA
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Crystal Lake, IA
- Average wind speed in January:
10.8mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.5mph - Average wind speed in June:
8.5mph
- Average wind speed in July:
7.4mph - Average wind speed in August:
7.5mph - Average wind speed in September:
8.6mph - Average wind speed in October:
10.1mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity
Crystal Lake, IA
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Crystal Lake, IA
- Average rainfall in January:
0.98" - Average rainfall in February:
1.22" - Average rainfall in March:
1.46" - Average rainfall in April:
2.72" - Average rainfall in May:
3.15" - Average rainfall in June:
4.21"
- Average rainfall in July:
2.4" - Average rainfall in August:
2.52" - Average rainfall in September:
2.44" - Average rainfall in October:
1.97" - Average rainfall in November:
1.06" - Average rainfall in December:
1.26"
The wettest month (with the highest rainfall) is June (4.21").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days
Crystal Lake, IA
- Average rainfall days in January:
4.6 days - Average rainfall days in February:
3 days - Average rainfall days in March:
10 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
18.8 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
7.2 days - Average rainfall days in December:
5.7 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (3 days).
Average snowfall
Crystal Lake, IA
- Average snowfall in January:
4.8" - Average snowfall in February:
5.79" - Average snowfall in March:
3.23" - Average snowfall in April:
2.09" - Average snowfall in May:
0.43" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Crystal Lake, IA
- Average snowfall days in January:
13.3 days - Average snowfall days in February:
11.3 days - Average snowfall days in March:
8 days - Average snowfall days in April:
3.2 days - Average snowfall days in May:
0.3 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:
2 days - Average snowfall days in November:
5 days - Average snowfall days in December:
12 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Crystal Lake, IA
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
3h and 3min - Average sunshine in February:
4h and 0min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days
Crystal Lake, IA
- Average sunshine days in January:
14.9 days - Average sunshine days in February:
13.9 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
12.2 days - Average sunshine days in May:
10.8 days - Average sunshine days in June:
9.2 days
- Average sunshine days in July:
12.1 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
17.4 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
15.6 days
The months with the most sunshine days are October and November (17.4 days).
The month with the least sunshine days is June (9.2 days).
Average UV index
Crystal Lake, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Crystal Lake, IA
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Crystal Lake, IA
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).