May is one of the cooler months of the year in Griffith, with average highs near 19.2°C and lows around 7.5°C (mean 13.4°C). It is about average for rainfall, averaging 34 mm of rainfall and 70% relative humidity across the period.
May is one of the cooler months of the year in Griffith. Across 45 years of records, the warmest May in Griffith was 2007 — when the month averaged 15.4°C — while the coldest was 2020 at 11.4°C. Typical May days reach 19.2°C with nights near 7.5°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Griffith, averaging 34 mm of rainfall. The wettest May on record was 1988 with 109 mm, while the driest was 2006 at 3 mm.
Relative humidity in Griffith during May averages 70%. The most humid May was 1989 at 83%, and the least humid was 2005 at 54%.
May receives about 3.1 kWh/m²/day of solar energy in Griffith. The sunniest Mays were 1984, 2005 and 2006 at 3.4 kWh/m²/day, and the cloudiest were 1988 and 1995 at 2.7.
Average wind speed in Griffith during May is 2.3 m/s. The windiest May was 2016 at 2.8 m/s, while the calmest were 2001, 2005 and 2008, among others at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.4°C | 13.5°C | 13.5°C | 13.3°C | 13.1°C | -0.3°C |
| Avg High | 19.1°C | 19.5°C | 19.7°C | 19.0°C | 18.9°C | -0.2°C |
| Avg Low | 7.8°C | 7.6°C | 7.4°C | 7.5°C | 7.3°C | -0.5°C |
| Avg Rain | 51 mm | 36 mm | 21 mm | 35 mm | 27 mm | -24 mm |
May temperatures in Griffith have risen by about 0.3°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 0.2°C (1999) to a record high of 29.4°C (2018).
Rainfall in May is about average for rainfall, averaging 34 mm, with a wettest year of 109 mm.
A good time to visit Griffith
May is a good time to visit Griffith, with days averaging 19.2°C and nights around 7.5°C (mean 13.4°C, cooler than Griffith's yearly average) and moderate rainfall. March and November are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 21.0°C | 14.9°C | 8.7°C | 26.8°C | 4.9°C | 19 mm | 61% | 2.4 m/s | 3.3 |
| 2024 | 19.4°C | 13.6°C | 7.9°C | 22.6°C | 2.7°C | 43 mm | 71% | 2.2 m/s | 3.1 |
| 2023 | 17.7°C | 12.0°C | 6.2°C | 23.3°C | 2.3°C | 13 mm | 72% | 2.3 m/s | 3.1 |
| 2022 | 18.7°C | 13.5°C | 8.2°C | 23.9°C | 3.1°C | 52 mm | 76% | 2.4 m/s | 2.9 |
| 2021 | 19.2°C | 13.2°C | 7.1°C | 25.4°C | 0.3°C | 23 mm | 70% | 2.3 m/s | 3.3 |
| 2020 ❄️ | 17.2°C | 11.4°C | 5.7°C | 23.1°C | 2.6°C | 11 mm | 78% | 2.5 m/s | 3.2 |
| 2019 | 18.8°C | 13.1°C | 7.4°C | 24.7°C | 2.4°C | 38 mm | 70% | 2.6 m/s | 3.2 |
| 2018 | 19.7°C | 13.7°C | 7.7°C | 29.4°C | 3.2°C | 19 mm | 65% | 2.7 m/s | 3.3 |
| 2017 | 19.2°C | 13.4°C | 7.5°C | 24.3°C | 2.2°C | 16 mm | 68% | 2.1 m/s | 3.2 |
| 2016 | 19.7°C | 14.0°C | 8.3°C | 26.5°C | 0.8°C | 58 mm | 69% | 2.8 m/s | 3 |
| 2015 | 18.9°C | 13.2°C | 7.5°C | 23.9°C | 3.0°C | 16 mm | 72% | 2.7 m/s | 3 |
| 2014 | 20.2°C | 14.8°C | 9.4°C | 26.3°C | 4.2°C | 46 mm | 72% | 2.4 m/s | 2.9 |
| 2013 | 19.1°C | 13.2°C | 7.3°C | 25.3°C | 2.3°C | 44 mm | 69% | 2.5 m/s | 3.1 |
| 2012 | 17.5°C | 11.7°C | 5.8°C | 24.8°C | 3.2°C | 19 mm | 76% | 2.2 m/s | 3.2 |
| 2011 | 17.2°C | 11.8°C | 6.3°C | 23.3°C | 2.0°C | 34 mm | 75% | 2.3 m/s | 3.1 |
| 2010 | 19.4°C | 13.6°C | 7.7°C | 26.4°C | 3.1°C | 58 mm | 71% | 2.1 m/s | 3.1 |
| 2009 | 19.7°C | 13.8°C | 7.8°C | 24.2°C | 2.5°C | 12 mm | 70% | 2.4 m/s | 3.3 |
| 2008 | 19.6°C | 13.4°C | 7.1°C | 23.9°C | 2.9°C | 6 mm | 69% | 1.9 m/s | 3.2 |
| 2007 🔥 | 21.4°C | 15.4°C | 9.3°C | 26.9°C | 2.7°C | 42 mm | 67% | 2.4 m/s | 3 |
| 2006 | 18.5°C | 12.1°C | 5.7°C | 24.0°C | 1.7°C | 3 mm | 66% | 2.3 m/s | 3.4 |
| 2005 | 21.8°C | 14.9°C | 8.1°C | 27.5°C | 3.3°C | 4 mm | 54% | 1.9 m/s | 3.4 |
| 2004 | 18.4°C | 12.2°C | 6.0°C | 22.7°C | 0.5°C | 25 mm | 63% | 2.3 m/s | 3.3 |
| 2003 | 20.6°C | 14.4°C | 8.2°C | 24.1°C | 3.4°C | 16 mm | 67% | 2.2 m/s | 3.2 |
| 2002 | 19.8°C | 14.0°C | 8.2°C | 27.0°C | 3.0°C | 20 mm | 62% | 2.1 m/s | 3 |
| 2001 | 18.8°C | 12.8°C | 6.8°C | 25.9°C | 3.3°C | 9 mm | 71% | 1.9 m/s | 3.2 |
| 2000 | 17.9°C | 12.3°C | 6.7°C | 26.8°C | 1.7°C | 70 mm | 75% | 2.6 m/s | 3 |
| 1999 | 19.9°C | 13.7°C | 7.4°C | 24.7°C | 0.2°C | 39 mm | 67% | 2.1 m/s | 3.1 |
| 1998 | 19.3°C | 13.5°C | 7.7°C | 23.6°C | 2.6°C | 13 mm | 68% | 2.3 m/s | 3.1 |
| 1997 | 19.5°C | 13.9°C | 8.3°C | 28.8°C | 1.4°C | 38 mm | 68% | 2.2 m/s | 2.8 |
| 1996 | 19.7°C | 13.5°C | 7.4°C | 26.6°C | 1.7°C | 23 mm | 73% | 2.3 m/s | 3.1 |
| 1995 | 18.2°C | 13.1°C | 8.0°C | 23.9°C | 3.7°C | 92 mm | 77% | 2.4 m/s | 2.7 |
| 1994 | 20.0°C | 13.8°C | 7.6°C | 24.5°C | 2.5°C | 4 mm | 59% | 2.7 m/s | 3.3 |
| 1993 | 20.2°C | 13.8°C | 7.5°C | 26.1°C | 1.3°C | 30 mm | 63% | 1.9 m/s | 3.2 |
| 1992 | 18.5°C | 12.8°C | 7.1°C | 24.6°C | 2.6°C | 34 mm | 74% | 1.9 m/s | 3.1 |
| 1991 | 20.3°C | 13.7°C | 7.1°C | 26.4°C | 2.8°C | 25 mm | 63% | 2 m/s | 3.3 |
| 1990 | 18.9°C | 13.2°C | 7.6°C | 25.7°C | 1.7°C | 59 mm | 74% | 2.3 m/s | 3.2 |
| 1989 | 18.9°C | 14.1°C | 9.4°C | 23.3°C | 3.6°C | 68 mm | 83% | 2.3 m/s | 2.8 |
| 1988 🌧️ | 19.6°C | 14.4°C | 9.3°C | 28.2°C | 4.4°C | 109 mm | 76% | 2.3 m/s | 2.7 |
| 1987 | 18.5°C | 12.7°C | 7.0°C | 24.9°C | 1.1°C | 36 mm | 72% | 2.5 m/s | 3 |
| 1986 | 19.6°C | 13.7°C | 7.8°C | 24.5°C | 2.0°C | 45 mm | 69% | 2.4 m/s | 3.1 |
| 1985 | 19.6°C | 13.5°C | 7.5°C | 27.0°C | 2.5°C | 39 mm | 70% | 2.5 m/s | 3.2 |
| 1984 | 19.3°C | 13.0°C | 6.8°C | 23.9°C | 2.9°C | 5 mm | 68% | 2 m/s | 3.4 |
| 1983 | 18.1°C | 13.2°C | 8.2°C | 23.1°C | 1.7°C | 89 mm | 80% | 2.7 m/s | — |
| 1982 | 18.5°C | 12.4°C | 6.3°C | 24.5°C | 0.5°C | 21 mm | 66% | 2.4 m/s | — |
| 1981 | 19.4°C | 13.6°C | 7.7°C | 26.8°C | 2.5°C | 48 mm | 69% | 2.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.2°C with lows near 7.5°C (mean 13.4°C), based on 45 years of NASA POWER data.
May averages 34 mm of rainfall in Griffith, about average for rainfall. The wettest on record was 109 mm in 1988.
The hottest May reached 29.4°C in 2018. The coldest dipped to 0.2°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.3°C. Daytime highs moved from 19°C to 19.2°C and overnight lows from 7.3°C to 7.6°C over the same span.
May is one of the cooler months of the year in Griffith and about average for rainfall, so plan for around 19.2°C daytime highs and 7.5°C at night.
Not quite — May is the 4th coolest month in Griffith, averaging 13.4°C.
For May in Griffith, pack warm layers and a jacket for chilly mornings, with typical highs of 19.2°C and lows of 7.5°C.
Relative humidity in May averages 70% — moderately humid.
Average wind speed in May is 2.3 m/s. The windiest May on record averaged 2.8 m/s (2016).
The wettest May on record was 1988 with 109 mm. On average, May sees 34 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 Griffith 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.
