Dekalb Weather History

Illinois, United States of America

Weather on a past date in Dekalb

Any date from 1 January 2009 to yesterday.

Tue 20 Oct, 2026 Weather in Dekalb

Sunrise: 07:13 AM
Sunset: 06:06 PM		Moonrise: 03:39 PM
Moonset: 01:27 AM		Max:
19.2 °c		Min:
7.0 °c		Avg:
12.8 °c		Precip:
0.00 mm		Max Wind:
9.7 kph
 
Tue 20
0:00 am
Tue 20
3:00 am
Tue 20
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Tue 20
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Tue 20
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Tue 20
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Tue 20
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IconClearCloudyClearSunnySunnySunnySunnyClear
Temp11.1°c8.4°c7.8°c11.7°c17.5°c19.2°c14.8°c12.7°c
Wind4.7 kmph5.8 kmph8.3 kmph7.9 kmph9.4 kmph7.9 kmph7.6 kmph8.3 kmph
Precip0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm
Cloud13%67%5%0%0%0%0%0%
Humidity61%66%64%60%45%37%52%56%
Pressure1028 mb1028 mb1028 mb1029 mb1028 mb1026 mb1026 mb1026 mb

Dekalb Annual Weather Averages

MonthHigh TempLow TempAvg TempSunshine HoursRainfallRain daysPressure
January-2°C / 28°F-9°C / 15°F-6°C / 21°F108 hours55.43 mm / 2.18 In8 days1020 mb / 31 In
February0°C / 32°F-8°C / 18°F-4°C / 25°F116 hours57.89 mm / 2.28 In6 days1019 mb / 31 In
March8°C / 46°F-1°C / 31°F3°C / 38°F140 hours100.00 mm / 3.94 In7 days1018 mb / 31 In
April14°C / 57°F4°C / 40°F9°C / 48°F136 hours143.61 mm / 5.65 In9 days1014 mb / 30 In
May20°C / 69°F11°C / 51°F15°C / 60°F172 hours157.66 mm / 6.21 In10 days1015 mb / 30 In
June26°C / 78°F16°C / 60°F21°C / 69°F204 hours182.39 mm / 7.18 In10 days1013 mb / 30 In
July27°C / 81°F18°C / 64°F22°C / 72°F214 hours119.24 mm / 4.69 In8 days1015 mb / 30 In
August26°C / 80°F17°C / 62°F21°C / 71°F217 hours128.00 mm / 5.04 In8 days1015 mb / 30 In
September24°C / 75°F13°C / 56°F18°C / 65°F216 hours89.75 mm / 3.53 In6 days1017 mb / 31 In
October16°C / 61°F7°C / 45°F11°C / 53°F171 hours105.42 mm / 4.15 In7 days1016 mb / 30 In
November8°C / 47°F0°C / 33°F4°C / 39°F170 hours74.84 mm / 2.95 In5 days1019 mb / 31 In
December2°C / 35°F-5°C / 24°F-2°C / 29°F119 hours68.24 mm / 2.69 In7 days1019 mb / 31 In

Need more than one day of Dekalb history?

Download historical weather for Dekalb, or any other location, in CSV from January 2009 onwards. Ideal for research, insurance, energy, agriculture and machine-learning projects.

  • Historical weatherDaily and hourly interval data.
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  • Monthly climate averagesLong-term climate normals by month.
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Weather history near Dekalb

Region

Illinois

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Dekalb weather history: common questions

How far back does Dekalb weather history go?

Hourly historical weather is available from 1 January 2009. Choose a date above, or pick a month at the top of the page for long-term averages.

Can I download Dekalb historical weather as a file?

Yes. Buy historical weather data as daily or hourly CSV, yearly monthly averages or monthly climate averages. A free sample download is available.

Is there an API for historical weather?

Yes. The WeatherAPI.com History API returns hourly weather for any past date from 2010, as JSON or XML. Get a free API key.

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