Merrimack Weather History

New Hampshire, United States of America

Weather on a past date in Merrimack

Any date from 1 January 2009 to yesterday.

Mon 19 Oct, 2026 Weather in Merrimack

Sunrise: 07:04 AM
Sunset: 05:57 PM		Moonrise: 03:09 PM
Moonset: 12:09 AM		Max:
15.8 °c		Min:
1.4 °c		Avg:
7.4 °c		Precip:
0.00 mm		Max Wind:
7.2 kph
 
Mon 19
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Mon 19
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Mon 19
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Mon 19
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Mon 19
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IconClearClearClearSunnySunnyPartly cloudyOvercastOvercast
Temp2.9°c2.2°c1.6°c7.5°c14.6°c15.8°c8.6°c5.4°c
Wind6.5 kmph4.0 kmph2.5 kmph1.4 kmph2.5 kmph6.5 kmph6.8 kmph1.8 kmph
Precip0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm0.00 mm
Cloud0%0%0%0%22%32%100%100%
Humidity74%80%81%60%40%40%73%88%
Pressure1035 mb1035 mb1035 mb1034 mb1032 mb1029 mb1027 mb1027 mb

Merrimack Annual Weather Averages

MonthHigh TempLow TempAvg TempSunshine HoursRainfallRain daysPressure
January-0°C / 32°F-8°C / 18°F-4°C / 25°F171 hours82.70 mm / 3.26 In8 days1016 mb / 30 In
February1°C / 34°F-7°C / 19°F-3°C / 27°F138 hours91.46 mm / 3.60 In8 days1016 mb / 30 In
March6°C / 43°F-3°C / 27°F2°C / 35°F145 hours103.61 mm / 4.08 In8 days1016 mb / 30 In
April13°C / 55°F3°C / 38°F8°C / 46°F150 hours101.23 mm / 3.99 In8 days1015 mb / 30 In
May20°C / 67°F9°C / 48°F14°C / 58°F179 hours95.86 mm / 3.77 In7 days1016 mb / 30 In
June25°C / 76°F14°C / 57°F19°C / 66°F192 hours108.52 mm / 4.27 In9 days1013 mb / 30 In
July28°C / 83°F17°C / 63°F23°C / 73°F221 hours125.07 mm / 4.92 In10 days1014 mb / 30 In
August27°C / 81°F16°C / 62°F22°C / 71°F230 hours103.33 mm / 4.07 In8 days1015 mb / 30 In
September23°C / 73°F13°C / 55°F17°C / 63°F203 hours106.09 mm / 4.18 In6 days1018 mb / 31 In
October16°C / 61°F7°C / 45°F11°C / 52°F179 hours121.72 mm / 4.79 In6 days1017 mb / 30 In
November9°C / 48°F1°C / 34°F5°C / 41°F196 hours91.04 mm / 3.58 In6 days1018 mb / 31 In
December3°C / 37°F-3°C / 26°F-0°C / 31°F169 hours133.32 mm / 5.25 In8 days1017 mb / 31 In

Need more than one day of Merrimack history?

Download historical weather for Merrimack, 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 Merrimack

Region

New Hampshire

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Merrimack weather history: common questions

How far back does Merrimack 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 Merrimack 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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