April is one of the cooler months of the year in Carterton, with average highs near 12.6°C and lows around 3.5°C (mean 8.1°C). It is about average for rainfall, averaging 56 mm of rainfall and 84% relative humidity across the period.
April is one of the cooler months of the year in Carterton. Across 45 years of records, the warmest April in Carterton was 2011 — when the month averaged 11.3°C — while the coldest was 1986 at 4.9°C. Typical April days reach 12.6°C with nights near 3.5°C. The long-term trend is warming, about 0.4°C per decade.
April is about average for rainfall in Carterton, averaging 56 mm of rainfall. The wettest April on record was 2000 with 153 mm, while the driest was 1984 at 9 mm.
Relative humidity in Carterton during April averages 84%. The most humid April was 2018 at 88%, and the least humid was 1997 at 79%.
April receives about 3.9 kWh/m²/day of solar energy in Carterton. The sunniest April was 2025 at 4.9 kWh/m²/day, and the cloudiest were 1993 and 1998 at 3.2.
Average wind speed in Carterton during April is 3.1 m/s. The windiest April was 1991 at 4.1 m/s, while the calmest was 2021 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.2°C | 7.8°C | 8.4°C | 8.3°C | 8.5°C | +1.3°C |
| Avg High | 11.6°C | 12.2°C | 12.8°C | 13.0°C | 13.4°C | +1.8°C |
| Avg Low | 2.6°C | 3.4°C | 4.0°C | 3.7°C | 3.5°C | +0.9°C |
| Avg Rain | 57 mm | 61 mm | 64 mm | 47 mm | 44 mm | -14 mm |
April temperatures in Carterton have risen by about 0.9°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -4.5°C (1996) to a record high of 22.9°C (2011).
Rainfall in April is about average for rainfall, averaging 56 mm, with a wettest year of 153 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
A good time to visit Carterton
April is a good time to visit Carterton, with days averaging 12.6°C and nights around 3.5°C (mean 8.1°C, cooler than Carterton's yearly average) and moderate rainfall. July and August 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 | 15.6°C | 9.9°C | 4.2°C | 22.3°C | -0.1°C | 31 mm | 80% | 2.7 m/s | 4.9 |
| 2024 | 12.6°C | 8.9°C | 5.2°C | 17.4°C | 0.4°C | 75 mm | 85% | 3.9 m/s | 3.8 |
| 2023 | 12.4°C | 7.9°C | 3.4°C | 17.1°C | -3.1°C | 68 mm | 84% | 2.9 m/s | 3.9 |
| 2022 | 13.8°C | 8.7°C | 3.7°C | 19.7°C | -2.7°C | 23 mm | 81% | 3.2 m/s | 4.3 |
| 2021 | 11.0°C | 5.7°C | 0.3°C | 15.6°C | -3.1°C | 17 mm | 80% | 2.5 m/s | 4.6 |
| 2020 | 15.1°C | 9.6°C | 4.2°C | 21.3°C | -1.7°C | 48 mm | 82% | 2.8 m/s | 4.8 |
| 2019 | 13.7°C | 8.6°C | 3.5°C | 21.2°C | -3.4°C | 39 mm | 81% | 3 m/s | 4 |
| 2018 | 12.7°C | 9.0°C | 5.2°C | 22.7°C | -0.4°C | 83 mm | 88% | 3.3 m/s | 3.3 |
| 2017 | 13.4°C | 8.4°C | 3.3°C | 19.9°C | -1.6°C | 19 mm | 82% | 2.6 m/s | 4.3 |
| 2016 | 10.9°C | 6.5°C | 2.1°C | 14.4°C | -2.6°C | 60 mm | 84% | 2.9 m/s | 4.1 |
| 2015 | 13.9°C | 8.7°C | 3.4°C | 18.6°C | -0.1°C | 24 mm | 82% | 2.9 m/s | 4.7 |
| 2014 | 14.0°C | 9.5°C | 5.1°C | 16.7°C | -0.7°C | 54 mm | 86% | 2.9 m/s | 3.8 |
| 2013 | 10.4°C | 6.2°C | 2.0°C | 16.8°C | -3.8°C | 31 mm | 85% | 3.8 m/s | 4.1 |
| 2012 | 10.9°C | 6.9°C | 2.9°C | 16.2°C | -3.5°C | 117 mm | 84% | 3.3 m/s | 3.6 |
| 2011 🔥 | 16.7°C | 11.3°C | 5.8°C | 22.9°C | 1.9°C | 10 mm | 81% | 2.8 m/s | 4.6 |
| 2010 | 13.3°C | 8.3°C | 3.3°C | 18.2°C | -0.6°C | 37 mm | 82% | 2.8 m/s | 4.5 |
| 2009 | 14.0°C | 9.3°C | 4.6°C | 17.8°C | 1.3°C | 57 mm | 84% | 2.7 m/s | 4.1 |
| 2008 | 11.4°C | 7.3°C | 3.2°C | 18.1°C | -2.1°C | 61 mm | 86% | 3.3 m/s | 3.9 |
| 2007 | 16.5°C | 10.9°C | 5.3°C | 21.3°C | 1.4°C | 12 mm | 82% | 2.7 m/s | 4.7 |
| 2006 | 12.3°C | 8.0°C | 3.7°C | 16.4°C | -4.3°C | 35 mm | 84% | 3.1 m/s | 3.7 |
| 2005 | 12.7°C | 8.4°C | 4.2°C | 19.7°C | -1.6°C | 51 mm | 84% | 3.1 m/s | 3.7 |
| 2004 | 13.1°C | 9.1°C | 5.0°C | 19.9°C | 1.0°C | 97 mm | 85% | 3.1 m/s | 3.6 |
| 2003 | 13.6°C | 8.7°C | 3.7°C | 22.8°C | -3.9°C | 45 mm | 83% | 3.3 m/s | 3.9 |
| 2002 | 13.3°C | 8.7°C | 4.0°C | 19.1°C | -0.2°C | 43 mm | 82% | 3.4 m/s | 4.3 |
| 2001 | 10.7°C | 6.9°C | 3.1°C | 16.2°C | -1.7°C | 89 mm | 87% | 3.3 m/s | 3.3 |
| 2000 🌧️ | 10.7°C | 7.0°C | 3.3°C | 16.8°C | -2.6°C | 153 mm | 88% | 3.3 m/s | 3.3 |
| 1999 | 12.6°C | 8.5°C | 4.5°C | 18.2°C | -2.1°C | 72 mm | 86% | 3.3 m/s | 3.6 |
| 1998 | 10.4°C | 6.9°C | 3.4°C | 15.8°C | -1.3°C | 125 mm | 88% | 3.5 m/s | 3.2 |
| 1997 | 13.8°C | 8.5°C | 3.3°C | 18.6°C | -2.1°C | 30 mm | 79% | 2.7 m/s | 4.2 |
| 1996 | 12.0°C | 7.5°C | 3.1°C | 18.7°C | -4.5°C | 54 mm | 86% | 2.8 m/s | 3.7 |
| 1995 | 13.1°C | 8.4°C | 3.7°C | 18.5°C | -3.2°C | 27 mm | 84% | 3 m/s | 3.9 |
| 1994 | 11.1°C | 6.9°C | 2.6°C | 20.6°C | -2.4°C | 54 mm | 85% | 4 m/s | 3.8 |
| 1993 | 12.8°C | 8.8°C | 4.8°C | 21.2°C | -0.2°C | 89 mm | 87% | 3.5 m/s | 3.2 |
| 1992 | 12.3°C | 8.1°C | 3.9°C | 17.5°C | -1.3°C | 59 mm | 83% | 3.7 m/s | 3.4 |
| 1991 | 11.8°C | 7.3°C | 2.9°C | 17.3°C | -1.7°C | 69 mm | 82% | 4.1 m/s | 3.7 |
| 1990 | 12.4°C | 7.3°C | 2.2°C | 21.1°C | -4.2°C | 30 mm | 81% | 3.3 m/s | 4.4 |
| 1989 | 9.9°C | 5.7°C | 1.4°C | 15.2°C | -3.2°C | 82 mm | 84% | 3.1 m/s | 3.3 |
| 1988 | 12.4°C | 7.6°C | 2.7°C | 17.4°C | -2.8°C | 39 mm | 85% | 3 m/s | 3.7 |
| 1987 | 14.3°C | 9.6°C | 4.8°C | 19.9°C | -1.0°C | 70 mm | 86% | 2.9 m/s | 3.6 |
| 1986 ❄️ | 8.7°C | 4.9°C | 1.2°C | 14.6°C | -2.5°C | 70 mm | 85% | 3.2 m/s | 3.4 |
| 1985 | 11.9°C | 7.7°C | 3.5°C | 18.0°C | -2.6°C | 59 mm | 85% | 3.9 m/s | 3.6 |
| 1984 | 12.9°C | 7.4°C | 1.8°C | 20.1°C | -3.8°C | 9 mm | 80% | 2.8 m/s | 4.5 |
| 1983 | 10.0°C | 6.1°C | 2.1°C | 15.0°C | -1.6°C | 88 mm | 86% | 3.1 m/s | — |
| 1982 | 12.7°C | 7.9°C | 3.2°C | 16.0°C | -2.7°C | 39 mm | 84% | 2.8 m/s | — |
| 1981 | 12.0°C | 7.5°C | 3.0°C | 18.8°C | -1.7°C | 59 mm | 85% | 3.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 12.6°C with lows near 3.5°C (mean 8.1°C), based on 45 years of NASA POWER data.
April averages 56 mm of rainfall in Carterton, about average for rainfall. The wettest on record was 153 mm in 2000.
The hottest April reached 22.9°C in 2011. The coldest dipped to -4.5°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.9°C. Daytime highs moved from 11.9°C to 13.1°C and overnight lows from 2.7°C to 3.4°C over the same span.
April is one of the cooler months of the year in Carterton and about average for rainfall, so plan for around 12.6°C daytime highs and 3.5°C at night.
Not quite — April is the 6th coolest month in Carterton, averaging 8.1°C.
For April in Carterton, pack warm layers and a jacket for chilly mornings, with typical highs of 12.6°C and lows of 3.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 84% — quite humid.
Average wind speed in April is 3.1 m/s. The windiest April on record averaged 4.1 m/s (1991).
The wettest April on record was 2000 with 153 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 Carterton 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.
