Northwest Harwich Weather in May
Average highs run from 57°F on May 1 to 66°F on May 31, and lows from 43°F to 53°F. Normal precipitation for the month is 3.50 in.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 62°F
- Average low
- 48°F
- Precipitation
- 3.50 in
- Record high
- 90°FMay 25, 2007
- Record low
- 31°FMay 7, 2001
- Chance of a freeze
- 4%
- Daylight
- 14 h 02 min to 14 h 59 min
- Cloud cover
- 66%
- Humidity
- 89%
- Dew point
- 48°F
- Wind
- 14.1 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 57°F | 43°F | 69°F 2010 | 32°F 1999 | 0% | |
| May 2 | 57°F | 43°F | 78°F 2001 | 35°F 2015 | 0% | |
| May 3 | 58°F | 44°F | 87°F 2001 | 35°F 2015 | 0% | |
| May 4 | 58°F | 44°F | 80°F 2001 | 37°F 2003 | 0% | |
| May 5 | 58°F | 44°F | 73°F 2010 | 35°F 2003 | 0% | |
| May 6 | 59°F | 45°F | 74°F 2023 | 35°F 2001 | 0% | |
| May 7 | 59°F | 45°F | 73°F 2023 | 31°F 2001 | 0% | |
| May 8 | 59°F | 45°F | 83°F 2000 | 38°F 2006 | 0% | |
| May 9 | 60°F | 46°F | 70°F 2000 | 37°F 2017 | 0% | |
| May 10 | 60°F | 46°F | 72°F 2001 | 36°F 2020 | 0% | |
| May 11 | 60°F | 46°F | 81°F 2004 | 34°F 2010 | 0% | |
| May 12 | 61°F | 47°F | 81°F 2023 | 37°F 2010 | 0% | |
| May 13 | 61°F | 47°F | 77°F 2023 | 36°F 2010 | 0% | |
| May 14 | 61°F | 47°F | 74°F 2022 | 37°F 1999 | 0% | |
| May 15 | 61°F | 48°F | 73°F 2021 | 36°F 1998 | 0% | |
| May 16 | 62°F | 48°F | 76°F 2017 | 40°F 1999 | 0% | |
| May 17 | 62°F | 48°F | 75°F 2015 | 41°F 2005 | 0% | |
| May 18 | 62°F | 49°F | 77°F 2017 | 41°F 2002 | 0% | |
| May 19 | 63°F | 49°F | 75°F 2017 | 37°F 2002 | 0% | |
| May 20 | 63°F | 49°F | 73°F 2026 | 40°F 2002 | 0% | |
| May 21 | 63°F | 50°F | 73°F 2022 | 37°F 2002 | 0% | |
| May 22 | 63°F | 50°F | 72°F 2013 | 43°F 2005 | 0% | |
| May 23 | 64°F | 50°F | 83°F 2021 | 43°F 2005 | 0% | |
| May 24 | 64°F | 51°F | 75°F 1998 | 42°F 2023 | 0% | |
| May 25 | 64°F | 51°F | 90°F 2007 | 44°F 2002 | 0% | |
| May 26 | 65°F | 51°F | 88°F 2010 | 41°F 2013 | 0% | |
| May 27 | 65°F | 52°F | 79°F 2021 | 42°F 1997 | 0% | |
| May 28 | 65°F | 52°F | 75°F 2006 | 43°F 1997 | 0% | |
| May 29 | 65°F | 52°F | 80°F 2018 | 44°F 2014 | 0% | |
| May 30 | 66°F | 53°F | 82°F 1998 | 40°F 2014 | 0% | |
| May 31 | 66°F | 53°F | 85°F 2022 | 42°F 2000 | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 5:37 AM, sunset 7:39 PM
- May 31
- sunrise 5:09 AM, sunset 8:08 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00199227 (W Harwich), public domain. Records: NOAA GHCN-Daily, station USW00094624, 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.