Harstad Weather in May
Average highs run from 5°C on May 1 to 9°C on May 31, and lows from 1°C to 5°C. Normal precipitation for the month is 78 mm over about 16 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 7°C
- Average low
- 3°C
- Precipitation
- 78 mm
- Reanalysis high
- 22°CMay 30, 2013
- Reanalysis low
- -3°CMay 1, 1996
- Daylight
- 18 h 22 min to 24 h 00 min
- Cloud cover
- 76%
- Humidity
- 82%
- Dew point
- 2°C
- Wind
- 13.7 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 5°C | 1°C | 15°C 2008 | -3°C 1996 | 53% |
| May 2 | 6°C | 1°C | 14°C 2009 | -3°C 1996 | 53% |
| May 3 | 6°C | 2°C | 14°C 2008 | -2°C 1996 | 52% |
| May 4 | 6°C | 2°C | 12°C 2004 | -2°C 1996 | 54% |
| May 5 | 6°C | 2°C | 16°C 2006 | -2°C 1996 | 54% |
| May 6 | 6°C | 2°C | 18°C 2004 | -1°C 2019 | 54% |
| May 7 | 6°C | 2°C | 20°C 2004 | -2°C 1991 | 55% |
| May 8 | 6°C | 2°C | 16°C 2004 | -1°C 2017 | 55% |
| May 9 | 6°C | 2°C | 13°C 2018 | -2°C 2020 | 55% |
| May 10 | 6°C | 2°C | 17°C 2018 | -2°C 2020 | 55% |
| May 11 | 6°C | 2°C | 12°C 2011 | -1°C 2000 | 55% |
| May 12 | 7°C | 2°C | 15°C 2002 | -1°C 2000 | 54% |
| May 13 | 7°C | 2°C | 12°C 2011 | -1°C 2020 | 55% |
| May 14 | 7°C | 3°C | 17°C 2018 | -1°C 2020 | 55% |
| May 15 | 7°C | 3°C | 17°C 2010 | -2°C 1994 | 54% |
| May 16 | 7°C | 3°C | 18°C 2010 | -2°C 1994 | 52% |
| May 17 | 7°C | 3°C | 18°C 2010 | -1°C 1996 | 54% |
| May 18 | 8°C | 3°C | 16°C 2003 | 0°C 1996 | 54% |
| May 19 | 8°C | 3°C | 16°C 2003 | 0°C 1997 | 53% |
| May 20 | 8°C | 3°C | 15°C 2003 | -1°C 1998 | 52% |
| May 21 | 8°C | 4°C | 17°C 2013 | 0°C 1998 | 53% |
| May 22 | 8°C | 4°C | 17°C 2013 | 0°C 1998 | 52% |
| May 23 | 8°C | 4°C | 17°C 2013 | 0°C 1998 | 53% |
| May 24 | 9°C | 4°C | 15°C 2013 | 0°C 1998 | 55% |
| May 25 | 9°C | 4°C | 13°C 2002 | 1°C 1994 | 55% |
| May 26 | 9°C | 4°C | 16°C 1995 | 1°C 2001 | 55% |
| May 27 | 9°C | 4°C | 17°C 2013 | 1°C 1994 | 56% |
| May 28 | 9°C | 4°C | 19°C 2013 | 1°C 1997 | 55% |
| May 29 | 9°C | 4°C | 20°C 2002 | 0°C 1997 | 54% |
| May 30 | 9°C | 5°C | 22°C 2013 | 1°C 2017 | 54% |
| May 31 | 9°C | 5°C | 22°C 2013 | 1°C 2012 | 55% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+2).
- May 1
- sunrise 3:42 AM, sunset 10:04 PM
- May 31
- sunrise , sunset
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: 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.