Westbrook climate

Westbrook Weather in May

NOAA 1991-2020 normals for Portland Intl Jetport, 6.4 km from Westbrook

Average highs run from 60°F on May 1 to 69°F on May 31, and lows from 41°F to 50°F. Normal precipitation for the month is 3.67 in over about 13 wet days.

May day by day

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

Normal daily high and low temperature at Westbrook, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
64°F
Average low
46°F
Precipitation
3.67 in
Record high
94°FMay 31, 1987
Record low
23°FMay 9, 1956
Chance of a freeze
32%
Daylight
14 h 10 min to 15 h 13 min
Cloud cover
66%
Humidity
81%
Dew point
47°F
Wind
5.4 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
May 160°F41°F75°F 197226°F 197839%
May 260°F41°F91°F 200125°F 196439%
May 361°F41°F92°F 200124°F 196639%
May 461°F42°F84°F 195526°F 194639%
May 561°F42°F82°F 194928°F 195140%
May 661°F42°F84°F 197628°F 196140%
May 762°F43°F84°F 201528°F 196740%
May 862°F43°F85°F 195727°F 196240%
May 962°F43°F92°F 197923°F 195640%
May 1063°F44°F88°F 197924°F 194740%
May 1163°F44°F83°F 198529°F 195140%
May 1263°F44°F88°F 199129°F 196240%
May 1363°F45°F83°F 199128°F 196240%
May 1464°F45°F84°F 202228°F 195140%
May 1564°F45°F85°F 200427°F 194740%
May 1664°F46°F90°F 195128°F 194740%
May 1765°F46°F90°F 197727°F 195740%
May 1865°F46°F93°F 201730°F 202340%
May 1965°F47°F92°F 202628°F 195140%
May 2065°F47°F89°F 202632°F 195540%
May 2166°F47°F91°F 200933°F 197640%0%
May 2266°F47°F90°F 199234°F 195040%0%
May 2366°F48°F87°F 199234°F 196340%0%
May 2466°F48°F91°F 199130°F 195640%0%
May 2567°F48°F92°F 200727°F 195640%0%
May 2667°F49°F91°F 201030°F 194940%0%
May 2767°F49°F85°F 194432°F 196940%0%
May 2868°F49°F90°F 198835°F 196840%0%
May 2968°F50°F90°F 199835°F 196240%0%
May 3068°F50°F86°F 201133°F 196140%0%
May 3169°F50°F94°F 198731°F 196139%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Westbrook, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 5:34 AM, sunset 7:44 PM
May 31
sunrise 5:03 AM, sunset 8:16 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014764 (Portland Intl Jetport), public domain. Records: NOAA GHCN-Daily, station USW00014764, 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.