Merrimac climate

Merrimac Weather in August

NOAA 1991-2020 normals for Haverhill, 9.3 km from Merrimac

Average highs run from 83°F on August 1 to 79°F on August 31, and lows from 61°F to 56°F. Normal precipitation for the month is 3.76 in over about 9 wet days.

August day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Merrimac, in °F, with the record for each date.406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

August at a glance

Average high
81°F
Average low
59°F
Precipitation
3.76 in
Record high
99°FAug 14, 2002
Record low
48°FAug 10, 1999
Chance of a freeze
0%
Days of 90°F or more
3.7
Daylight
14 h 30 min to 13 h 12 min
Cloud cover
54%
Humidity
75%
Dew point
60°F
Wind
3.6 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Aug 183°F61°F94°F 200655°F 202134%0%
Aug 283°F61°F96°F 200652°F 202334%0%
Aug 382°F61°F96°F 201255°F 202534%0%
Aug 482°F61°F98°F 202258°F 199734%0%
Aug 582°F61°F94°F 202253°F 201934%0%
Aug 682°F60°F97°F 202251°F 201334%0%
Aug 782°F60°F97°F 202252°F 200434%0%
Aug 882°F60°F98°F 202253°F 200433%0%
Aug 982°F60°F96°F 200151°F 199933%0%
Aug 1082°F60°F93°F 199748°F 199933%0%
Aug 1182°F60°F98°F 201649°F 200733%0%
Aug 1282°F60°F98°F 201652°F 200632%0%
Aug 1382°F59°F98°F 200251°F 200632%0%
Aug 1482°F59°F99°F 200253°F 200632%0%
Aug 1582°F59°F95°F 200254°F 201331%0%
Aug 1681°F59°F94°F 200253°F 202631%0%
Aug 1781°F59°F94°F 200253°F 200031%0%
Aug 1881°F59°F95°F 200250°F 200031%0%
Aug 1981°F58°F93°F 200250°F 201430%0%
Aug 2081°F58°F95°F 202249°F 200730%0%
Aug 2181°F58°F92°F 202248°F 200730%0%
Aug 2281°F58°F92°F 201750°F 200729%0%
Aug 2380°F58°F91°F 202053°F 200429%0%
Aug 2480°F58°F91°F 199852°F 201329%0%
Aug 2580°F57°F95°F 200751°F 200429%0%
Aug 2680°F57°F93°F 202149°F 201928%0%
Aug 2780°F57°F90°F 201449°F 201928%0%
Aug 2879°F57°F96°F 201849°F 202528%0%
Aug 2979°F57°F97°F 201850°F 200328%0%
Aug 3079°F56°F93°F 202249°F 202428%0%
Aug 3179°F56°F94°F 201048°F 200328%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Merrimac, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

August 1
sunrise 5:35 AM, sunset 8:05 PM
August 31
sunrise 6:08 AM, sunset 7:20 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00193505 (Haverhill), public domain. Records: NOAA GHCN-Daily, station USW00094723, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.