May is one of the cooler months of the year in Norseman, with average highs near 21.3°C and lows around 8.5°C (mean 14.9°C). It is about average for rainfall, averaging 29 mm of rainfall and 64% relative humidity across the period.
May is one of the cooler months of the year in Norseman. Across 45 years of records, the warmest May in Norseman was 2002 — when the month averaged 17.4°C — while the coldest was 2000 at 13°C. Typical May days reach 21.3°C with nights near 8.5°C. The long-term trend is warming, about 0.2°C per decade.
May is about average for rainfall in Norseman, averaging 29 mm of rainfall. The wettest May on record was 1986 with 105 mm, while the driest were 2002 and 2015 at 4 mm.
Relative humidity in Norseman during May averages 64%. The most humid May was 1992 at 76%, and the least humid was 2024 at 51%.
May receives about 3.1 kWh/m²/day of solar energy in Norseman. The sunniest Mays were 2018 and 2019 at 3.6 kWh/m²/day, and the cloudiest was 1997 at 2.5.
Average wind speed in Norseman during May is 2.8 m/s. The windiest May was 1981 at 3.4 m/s, while the calmest was 2000 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.3°C | 15.0°C | 15.2°C | 14.6°C | 15.5°C | +1.2°C |
| Avg High | 20.6°C | 21.1°C | 21.8°C | 21.1°C | 22.3°C | +1.7°C |
| Avg Low | 8.1°C | 8.9°C | 8.7°C | 8.1°C | 8.7°C | +0.6°C |
| Avg Rain | 50 mm | 31 mm | 19 mm | 24 mm | 18 mm | -32 mm |
May temperatures in Norseman have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 2.6°C (1982) to a record high of 33.3°C (2002).
Rainfall in May is about average for rainfall, averaging 29 mm, with a wettest year of 105 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0°C per decade, widening the gap between day and night.
A quieter season to visit Norseman
If your dates are flexible, the more temperate months of March and November tend to be the most comfortable for visiting Norseman. That said, May — with days averaging 21.3°C and nights around 8.5°C (mean 14.9°C) and low rainfall (29 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.0°C | 15.9°C | 8.8°C | 30.1°C | 4.5°C | 8 mm | 62% | 2.7 m/s | 3.5 |
| 2024 | 24.3°C | 17.2°C | 10.1°C | 30.0°C | 4.5°C | 10 mm | 51% | 2.9 m/s | 3.3 |
| 2023 | 22.0°C | 15.0°C | 8.0°C | 26.6°C | 3.6°C | 10 mm | 59% | 2.6 m/s | 3.4 |
| 2022 | 21.7°C | 15.2°C | 8.8°C | 27.2°C | 5.0°C | 18 mm | 59% | 3 m/s | 3.2 |
| 2021 | 21.4°C | 15.2°C | 9.1°C | 27.4°C | 4.4°C | 47 mm | 64% | 3 m/s | 2.9 |
| 2020 | 21.4°C | 14.5°C | 7.6°C | 30.0°C | 4.1°C | 16 mm | 54% | 3.3 m/s | 3.4 |
| 2019 | 20.7°C | 13.6°C | 6.4°C | 30.2°C | 3.0°C | 23 mm | 63% | 2.6 m/s | 3.6 |
| 2018 | 22.3°C | 15.3°C | 8.3°C | 29.3°C | 4.5°C | 8 mm | 55% | 3.1 m/s | 3.6 |
| 2017 | 21.1°C | 14.8°C | 8.5°C | 27.2°C | 4.0°C | 18 mm | 66% | 2.7 m/s | 3.1 |
| 2016 | 20.8°C | 14.0°C | 7.2°C | 27.8°C | 4.2°C | 29 mm | 66% | 2.8 m/s | 3.3 |
| 2015 | 20.0°C | 13.6°C | 7.2°C | 23.1°C | 3.2°C | 4 mm | 66% | 2.8 m/s | 3.1 |
| 2014 | 21.3°C | 15.4°C | 9.6°C | 25.0°C | 5.3°C | 30 mm | 70% | 2.6 m/s | 3 |
| 2013 | 21.2°C | 15.4°C | 9.5°C | 29.4°C | 5.0°C | 51 mm | 70% | 2.9 m/s | 2.9 |
| 2012 | 21.8°C | 14.9°C | 8.0°C | 26.9°C | 4.5°C | 8 mm | 63% | 2.6 m/s | 3.3 |
| 2011 | 20.6°C | 14.6°C | 8.6°C | 25.7°C | 4.6°C | 38 mm | 70% | 2.6 m/s | 2.9 |
| 2010 | 21.5°C | 14.8°C | 8.1°C | 28.8°C | 3.6°C | 35 mm | 62% | 2.9 m/s | 3.2 |
| 2009 | 21.4°C | 14.8°C | 8.1°C | 26.9°C | 5.1°C | 7 mm | 60% | 2.5 m/s | 3.4 |
| 2008 | 23.9°C | 16.8°C | 9.8°C | 30.6°C | 6.5°C | 16 mm | 59% | 2.7 m/s | 3.4 |
| 2007 | 20.4°C | 13.8°C | 7.2°C | 26.7°C | 2.8°C | 12 mm | 64% | 2.8 m/s | 3.1 |
| 2006 | 21.3°C | 14.6°C | 8.0°C | 26.4°C | 3.1°C | 23 mm | 66% | 2.7 m/s | 3.2 |
| 2005 | 23.2°C | 17.0°C | 10.9°C | 27.5°C | 5.4°C | 41 mm | 67% | 2.7 m/s | 2.9 |
| 2004 | 20.7°C | 14.4°C | 8.1°C | 29.9°C | 2.7°C | 11 mm | 61% | 2.7 m/s | 3.1 |
| 2003 | 22.1°C | 15.3°C | 8.6°C | 30.4°C | 3.8°C | 50 mm | 60% | 3 m/s | 3.2 |
| 2002 🔥 | 24.4°C | 17.4°C | 10.4°C | 33.3°C | 6.2°C | 4 mm | 58% | 2.7 m/s | 3.3 |
| 2001 | 21.6°C | 15.3°C | 8.9°C | 29.1°C | 2.8°C | 20 mm | 66% | 2.8 m/s | 3.1 |
| 2000 ❄️ | 19.4°C | 13.0°C | 6.7°C | 26.0°C | 3.3°C | 5 mm | 70% | 2.3 m/s | 3.1 |
| 1999 | 21.6°C | 15.7°C | 9.7°C | 29.2°C | 3.4°C | 49 mm | 69% | 2.8 m/s | 2.8 |
| 1998 | 22.7°C | 16.6°C | 10.6°C | 28.5°C | 4.5°C | 25 mm | 68% | 2.9 m/s | 2.8 |
| 1997 | 19.4°C | 14.3°C | 9.1°C | 26.7°C | 3.6°C | 51 mm | 71% | 2.9 m/s | 2.5 |
| 1996 | 22.3°C | 15.6°C | 9.0°C | 30.1°C | 4.9°C | 7 mm | 61% | 2.7 m/s | 3.1 |
| 1995 | 19.3°C | 13.1°C | 6.9°C | 23.7°C | 2.9°C | 37 mm | 69% | 3 m/s | 3.2 |
| 1994 | 23.3°C | 16.4°C | 9.4°C | 28.7°C | 5.2°C | 26 mm | 55% | 3 m/s | 3.3 |
| 1993 | 20.4°C | 14.2°C | 8.0°C | 25.1°C | 3.0°C | 27 mm | 66% | 2.6 m/s | 3 |
| 1992 | 19.1°C | 13.6°C | 8.2°C | 24.1°C | 3.5°C | 43 mm | 76% | 2.6 m/s | 3.1 |
| 1991 | 21.7°C | 15.4°C | 9.2°C | 27.3°C | 5.8°C | 14 mm | 61% | 2.9 m/s | 3.1 |
| 1990 | 21.3°C | 15.3°C | 9.3°C | 29.9°C | 3.8°C | 29 mm | 67% | 2.6 m/s | 3 |
| 1989 | 20.5°C | 14.4°C | 8.3°C | 25.5°C | 4.1°C | 71 mm | 68% | 2.8 m/s | 2.9 |
| 1988 | 19.9°C | 14.3°C | 8.8°C | 24.0°C | 6.0°C | 80 mm | 74% | 2.9 m/s | 2.9 |
| 1987 | 19.8°C | 13.3°C | 6.8°C | 25.9°C | 2.8°C | 35 mm | 64% | 2.9 m/s | 3.1 |
| 1986 🌧️ | 19.9°C | 14.0°C | 8.1°C | 26.3°C | 4.6°C | 105 mm | 69% | 2.7 m/s | 3.1 |
| 1985 | 20.4°C | 13.7°C | 7.0°C | 30.6°C | 3.3°C | 21 mm | 59% | 2.6 m/s | 3.3 |
| 1984 | 20.5°C | 14.4°C | 8.3°C | 25.3°C | 4.5°C | 58 mm | 67% | 3.2 m/s | 3.1 |
| 1983 | 23.4°C | 16.0°C | 8.6°C | 31.7°C | 4.0°C | 14 mm | 52% | 2.7 m/s | — |
| 1982 | 20.6°C | 14.4°C | 8.2°C | 27.7°C | 2.6°C | 29 mm | 66% | 2.6 m/s | — |
| 1981 | 20.5°C | 14.4°C | 8.4°C | 28.0°C | 3.6°C | 38 mm | 62% | 3.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 21.3°C with lows near 8.5°C (mean 14.9°C), based on 45 years of NASA POWER data.
May averages 29 mm of rainfall in Norseman, about average for rainfall. The wettest on record was 105 mm in 1986.
The hottest May reached 33.3°C in 2002. The coldest dipped to 2.6°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.1°C. Daytime highs moved from 21.1°C to 22.5°C and overnight lows from 8.1°C to 9°C over the same span.
May is one of the cooler months of the year in Norseman and about average for rainfall, so plan for around 21.3°C daytime highs and 8.5°C at night.
Not quite — May is the 4th coolest month in Norseman, averaging 14.9°C.
For May in Norseman, pack light layers you can adjust through the day, with typical highs of 21.3°C and lows of 8.5°C.
Relative humidity in May averages 64% — moderately humid.
Average wind speed in May is 2.8 m/s. The windiest May on record averaged 3.4 m/s (1981).
The wettest May on record was 1986 with 105 mm. On average, May sees 29 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Norseman behaves each May, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for May specifically, along with year-by-year records and how the month has changed over the decades.
