April is one of the cooler months of the year in Chatham, with average highs near 12°C and lows around 2.3°C (mean 7.2°C). It is about average for rainfall, averaging 56 mm of rainfall and 75% relative humidity across the period.
April is one of the cooler months of the year in Chatham. Across 45 years of records, the warmest Aprils in Chatham were 2010 and 2024 — when the month averaged 10.1°C — while the coldest was 2018 at 3.8°C. Typical April days reach 12°C with nights near 2.3°C. The long-term trend is warming, about 0.3°C per decade.
April is about average for rainfall in Chatham, averaging 56 mm of rainfall. The wettest April on record was 1981 with 121 mm, while the driest was 2021 at 16 mm.
Relative humidity in Chatham during April averages 75%. The most humid April was 1984 at 82%, and the least humid was 2025 at 67%.
April receives about 4.7 kWh/m²/day of solar energy in Chatham. The sunniest April was 2008 at 5.5 kWh/m²/day, and the cloudiest were 1992 and 2011 at 3.7.
Average wind speed in Chatham during April is 4.2 m/s. The windiest Aprils were 1982 and 2009 at 4.8 m/s, while the calmest was 1989 at 3.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.7°C | 6.8°C | 7.6°C | 7.0°C | 8.1°C | +1.4°C |
| Avg High | 11.5°C | 11.7°C | 12.5°C | 11.8°C | 13.0°C | +1.5°C |
| Avg Low | 2.0°C | 2.0°C | 2.6°C | 2.2°C | 3.2°C | +1.2°C |
| Avg Rain | 68 mm | 52 mm | 55 mm | 65 mm | 34 mm | -34 mm |
April temperatures in Chatham have risen by about 2°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -10.5°C (1982) to a record high of 26.9°C (2023).
Rainfall in April is about average for rainfall, averaging 56 mm, with a wettest year of 121 mm.
A good time to visit Chatham
April is a good time to visit Chatham, with days averaging 12°C and nights around 2.3°C (mean 7.2°C, cooler than Chatham's yearly average) and moderate rainfall. August and July are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 13.8°C | 8.3°C | 2.9°C | 26.1°C | -3.8°C | 45 mm | 67% | 4.2 m/s | 5 |
| 2024 | 14.9°C | 10.1°C | 5.3°C | 23.8°C | -2.5°C | 63 mm | 73% | 4.3 m/s | 5 |
| 2023 | 14.1°C | 8.9°C | 3.7°C | 26.9°C | -4.1°C | 31 mm | 69% | 3.8 m/s | 4.5 |
| 2022 | 11.2°C | 6.7°C | 2.2°C | 23.8°C | -2.4°C | 29 mm | 72% | 4.1 m/s | 4.4 |
| 2021 | 13.5°C | 8.7°C | 3.9°C | 23.7°C | -3.9°C | 16 mm | 69% | 3.8 m/s | 4.7 |
| 2020 | 10.5°C | 5.8°C | 1.1°C | 17.4°C | -3.3°C | 21 mm | 74% | 4.1 m/s | 4.7 |
| 2019 | 11.2°C | 7.0°C | 2.9°C | 17.7°C | -8.0°C | 82 mm | 79% | 4.2 m/s | 4.3 |
| 2018 ❄️ | 8.3°C | 3.8°C | -0.7°C | 17.9°C | -5.2°C | 56 mm | 76% | 4 m/s | 4.6 |
| 2017 | 14.5°C | 9.8°C | 5.0°C | 21.9°C | -2.1°C | 84 mm | 78% | 4.3 m/s | 4.6 |
| 2016 | 10.5°C | 5.7°C | 0.9°C | 22.6°C | -5.7°C | 50 mm | 74% | 3.9 m/s | 4.7 |
| 2015 | 12.2°C | 6.9°C | 1.7°C | 19.4°C | -4.8°C | 59 mm | 76% | 4.1 m/s | 4.5 |
| 2014 | 11.7°C | 6.5°C | 1.4°C | 20.2°C | -5.6°C | 74 mm | 75% | 4.3 m/s | 4.8 |
| 2013 | 10.3°C | 5.8°C | 1.3°C | 20.7°C | -4.7°C | 75 mm | 78% | 4.4 m/s | 4.2 |
| 2012 | 12.9°C | 7.6°C | 2.4°C | 20.4°C | -1.6°C | 39 mm | 72% | 4.1 m/s | 5.1 |
| 2011 | 11.2°C | 6.7°C | 2.2°C | 20.7°C | -2.3°C | 85 mm | 79% | 4.7 m/s | 3.7 |
| 2010 🔥 | 15.6°C | 10.1°C | 4.5°C | 24.0°C | -0.7°C | 45 mm | 69% | 4.1 m/s | 4.9 |
| 2009 | 12.8°C | 7.9°C | 3.0°C | 22.7°C | -2.5°C | 83 mm | 74% | 4.8 m/s | 4.8 |
| 2008 | 13.8°C | 8.6°C | 3.4°C | 21.1°C | -4.4°C | 17 mm | 73% | 3.9 m/s | 5.5 |
| 2007 | 11.4°C | 6.7°C | 2.1°C | 21.2°C | -4.6°C | 22 mm | 72% | 4.7 m/s | 4.6 |
| 2006 | 14.3°C | 8.8°C | 3.4°C | 20.7°C | -3.3°C | 29 mm | 71% | 3.8 m/s | 5.1 |
| 2005 | 13.4°C | 8.1°C | 2.8°C | 23.7°C | -0.4°C | 42 mm | 70% | 4.4 m/s | 5 |
| 2004 | 12.2°C | 7.7°C | 3.1°C | 21.1°C | -3.6°C | 51 mm | 76% | 4.4 m/s | 4.7 |
| 2003 | 11.3°C | 5.9°C | 0.6°C | 22.0°C | -8.0°C | 46 mm | 76% | 4.4 m/s | 4.7 |
| 2002 | 11.6°C | 7.2°C | 2.7°C | 21.6°C | -3.3°C | 76 mm | 80% | 4 m/s | 4.4 |
| 2001 | 13.0°C | 8.0°C | 2.9°C | 20.7°C | -2.9°C | 63 mm | 77% | 4 m/s | 4.8 |
| 2000 | 11.5°C | 6.9°C | 2.3°C | 20.0°C | -3.9°C | 119 mm | 76% | 3.7 m/s | 4.4 |
| 1999 | 12.5°C | 7.8°C | 3.1°C | 19.8°C | -0.8°C | 102 mm | 75% | 4.2 m/s | 4.7 |
| 1998 | 13.5°C | 8.5°C | 3.4°C | 18.7°C | -2.9°C | 39 mm | 70% | 3.7 m/s | 5.2 |
| 1997 | 10.9°C | 5.8°C | 0.7°C | 18.6°C | -5.5°C | 17 mm | 71% | 3.9 m/s | 5 |
| 1996 | 10.2°C | 5.2°C | 0.2°C | 19.1°C | -4.3°C | 69 mm | 75% | 4.5 m/s | 4.4 |
| 1995 | 9.9°C | 5.2°C | 0.4°C | 16.8°C | -5.8°C | 53 mm | 73% | 4.4 m/s | 4 |
| 1994 | 12.5°C | 7.3°C | 2.1°C | 23.1°C | -2.7°C | 62 mm | 74% | 4.7 m/s | 5 |
| 1993 | 11.1°C | 6.4°C | 1.7°C | 18.1°C | -3.1°C | 46 mm | 78% | 4 m/s | 4.2 |
| 1992 | 10.6°C | 6.1°C | 1.5°C | 19.8°C | -4.7°C | 50 mm | 78% | 3.6 m/s | 3.7 |
| 1991 | 13.0°C | 8.5°C | 4.1°C | 21.0°C | -3.3°C | 45 mm | 80% | 4.6 m/s | 4.2 |
| 1990 | 12.5°C | 7.6°C | 2.7°C | 24.5°C | -4.7°C | 33 mm | 76% | 3.8 m/s | 4.8 |
| 1989 | 9.9°C | 5.3°C | 0.7°C | 18.6°C | -5.4°C | 62 mm | 75% | 3.4 m/s | 4.7 |
| 1988 | 12.0°C | 6.9°C | 1.9°C | 18.0°C | -3.1°C | 55 mm | 77% | 4.1 m/s | 5 |
| 1987 | 12.8°C | 8.0°C | 3.3°C | 23.8°C | -9.9°C | 56 mm | 80% | 3.9 m/s | 4.9 |
| 1986 | 12.2°C | 7.5°C | 2.8°C | 20.7°C | -3.3°C | 66 mm | 80% | 3.7 m/s | 4.8 |
| 1985 | 13.5°C | 8.8°C | 4.2°C | 22.6°C | -4.8°C | 52 mm | 80% | 4.1 m/s | 5.3 |
| 1984 | 10.7°C | 6.6°C | 2.5°C | 19.3°C | -2.6°C | 66 mm | 82% | 3.9 m/s | 4.4 |
| 1983 | 10.2°C | 5.7°C | 1.3°C | 20.5°C | -3.7°C | 84 mm | 79% | 4.4 m/s | — |
| 1982 | 9.4°C | 4.1°C | -1.2°C | 17.8°C | -10.5°C | 51 mm | 76% | 4.8 m/s | — |
| 1981 🌧️ | 12.4°C | 7.4°C | 2.4°C | 18.7°C | -4.5°C | 121 mm | 74% | 4.7 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 12°C with lows near 2.3°C (mean 7.2°C), based on 45 years of NASA POWER data.
April averages 56 mm of rainfall in Chatham, about average for rainfall. The wettest on record was 121 mm in 1981.
The hottest April reached 26.9°C in 2023. The coldest dipped to -10.5°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 2°C. Daytime highs moved from 11.2°C to 13.5°C and overnight lows from 1.8°C to 3.6°C over the same span.
April is one of the cooler months of the year in Chatham and about average for rainfall, so plan for around 12°C daytime highs and 2.3°C at night.
Not quite — April is the 6th coolest month in Chatham, averaging 7.2°C.
For April in Chatham, pack warm layers and a jacket for chilly mornings, with typical highs of 12°C and lows of 2.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 75% — quite humid.
Average wind speed in April is 4.2 m/s. The windiest April on record averaged 4.8 m/s (1982).
The wettest April on record was 1981 with 121 mm. On average, April sees 56 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 Chatham behaves each April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
