Longmont Weather History

Colorado, United States of America

Weather on a past date in Longmont

Any date from 1 January 2009 to yesterday.

Wed 21 Oct, 2026 Weather in Longmont

Sunrise: 07:17 AM
Sunset: 06:12 PM		Moonrise: 04:04 PM
Moonset: 02:40 AM		Max:
24.1 °c		Min:
7.8 °c		Avg:
15.0 °c		Precip:
0.00 mm		Max Wind:
14.8 kph
 
Wed 21
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IconClearPartly cloudyOvercastCloudySunnyOvercastOvercastCloudy
Temp9.9°c8.5°c7.8°c12.6°c20.5°c23.5°c19.2°c14.7°c
Wind6.1 kmph4.3 kmph1.8 kmph1.4 kmph7.6 kmph11.9 kmph6.6 kmph1.4 kmph
Precip0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm
Cloud0%59%100%71%16%89%88%81%
Humidity50%55%52%49%30%24%33%43%
Pressure1019 mb1020 mb1021 mb1022 mb1020 mb1016 mb1016 mb1017 mb

Longmont Annual Weather Averages

MonthHigh TempLow TempAvg TempSunshine HoursRainfallRain daysPressure
January4°C / 39°F-7°C / 19°F-2°C / 28°F260 hours20.36 mm / 0.80 In5 days1021 mb / 31 In
February5°C / 41°F-6°C / 21°F-1°C / 30°F233 hours24.75 mm / 0.97 In6 days1018 mb / 31 In
March11°C / 52°F-1°C / 29°F4°C / 40°F255 hours45.39 mm / 1.79 In5 days1015 mb / 30 In
April15°C / 59°F2°C / 35°F8°C / 47°F239 hours66.48 mm / 2.62 In7 days1012 mb / 30 In
May19°C / 67°F7°C / 44°F13°C / 55°F237 hours113.04 mm / 4.45 In10 days1012 mb / 30 In
June27°C / 81°F13°C / 56°F20°C / 68°F282 hours52.68 mm / 2.07 In7 days1012 mb / 30 In
July30°C / 87°F16°C / 61°F23°C / 74°F291 hours51.14 mm / 2.01 In9 days1015 mb / 30 In
August30°C / 86°F16°C / 60°F23°C / 73°F298 hours32.59 mm / 1.28 In7 days1015 mb / 30 In
September26°C / 79°F12°C / 53°F19°C / 66°F287 hours38.25 mm / 1.51 In4 days1015 mb / 30 In
October17°C / 63°F4°C / 39°F10°C / 50°F287 hours36.51 mm / 1.44 In4 days1015 mb / 30 In
November11°C / 51°F-2°C / 28°F3°C / 38°F284 hours26.60 mm / 1.05 In4 days1018 mb / 31 In
December5°C / 41°F-6°C / 21°F-2°C / 29°F271 hours19.35 mm / 0.76 In4 days1019 mb / 31 In

Need more than one day of Longmont history?

Download historical weather for Longmont, 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.
  • Yearly monthly averagesMonthly averages for every year since 2009.
  • Monthly climate averagesLong-term climate normals by month.
  • CSV formatReady for Excel, Python, R or your database.
Buy historical weather data Or use the History API

Weather history near Longmont

Region

Colorado

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Longmont weather history: common questions

How far back does Longmont 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 Longmont 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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