April is one of the warmer months of the year in Seymour, with average highs near 21.3°C and lows around 8.6°C (mean 15°C). It is about average for rainfall, averaging 44 mm of rainfall and 69% relative humidity across the period.
April is one of the warmer months of the year in Seymour. Across 45 years of records, the warmest April in Seymour was 2025 — when the month averaged 17.8°C — while the coldest was 1995 at 11.7°C. Typical April days reach 21.3°C with nights near 8.6°C. The long-term trend is warming, about 0.2°C per decade.
April is about average for rainfall in Seymour, averaging 44 mm of rainfall. The wettest April on record was 2020 with 173 mm, while the driest was 2019 at 3 mm.
Relative humidity in Seymour during April averages 69%. The most humid April was 2020 at 80%, and the least humid was 2019 at 58%.
April receives about 3.5 kWh/m²/day of solar energy in Seymour. The sunniest April was 2007 at 4 kWh/m²/day, and the cloudiest were 1996, 2014 and 2022 at 3.
Average wind speed in Seymour during April is 2.2 m/s. The windiest Aprils were 1986 and 1990 at 2.7 m/s, while the calmest was 1989 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.0°C | 14.1°C | 15.3°C | 15.5°C | 15.0°C | 0°C |
| Avg High | 21.3°C | 20.6°C | 21.9°C | 21.8°C | 21.0°C | -0.3°C |
| Avg Low | 8.6°C | 7.7°C | 8.8°C | 9.2°C | 9.0°C | +0.4°C |
| Avg Rain | 44 mm | 44 mm | 39 mm | 38 mm | 63 mm | +19 mm |
April temperatures in Seymour have risen by about 0.8°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 0.7°C (2009) to a record high of 35.1°C (1986).
Rainfall in April is about average for rainfall, averaging 44 mm, with a wettest year of 173 mm.
A good time to visit Seymour
April is a good time to visit Seymour, with days averaging 21.3°C and nights around 8.6°C (mean 15°C, close to Seymour's yearly average) and moderate rainfall. February and January 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 🔥 | 24.1°C | 17.8°C | 11.5°C | 30.0°C | 6.3°C | 19 mm | 64% | 2.1 m/s | 3.7 |
| 2024 | 20.4°C | 14.3°C | 8.2°C | 30.6°C | 5.4°C | 60 mm | 73% | 2.3 m/s | 3.2 |
| 2023 | 20.8°C | 14.8°C | 8.9°C | 26.6°C | 4.2°C | 47 mm | 74% | 2.1 m/s | 3.3 |
| 2022 | 21.5°C | 15.7°C | 9.9°C | 26.8°C | 5.6°C | 68 mm | 75% | 2.1 m/s | 3 |
| 2021 | 21.3°C | 14.6°C | 7.9°C | 30.5°C | 3.4°C | 12 mm | 70% | 2.1 m/s | 3.4 |
| 2020 🌧️ | 18.2°C | 12.8°C | 7.5°C | 23.8°C | 3.7°C | 173 mm | 80% | 2.2 m/s | 3.1 |
| 2019 | 23.4°C | 16.5°C | 9.6°C | 29.8°C | 3.4°C | 3 mm | 58% | 2.3 m/s | 3.7 |
| 2018 | 24.7°C | 17.4°C | 10.1°C | 33.3°C | 5.3°C | 12 mm | 62% | 2.2 m/s | 3.8 |
| 2017 | 21.3°C | 15.2°C | 9.1°C | 26.6°C | 4.7°C | 55 mm | 71% | 2.2 m/s | 3.4 |
| 2016 | 23.2°C | 16.6°C | 10.0°C | 28.0°C | 5.2°C | 34 mm | 64% | 2.3 m/s | 3.5 |
| 2015 | 20.3°C | 14.2°C | 8.1°C | 28.4°C | 4.3°C | 41 mm | 69% | 2.5 m/s | 3.4 |
| 2014 | 20.4°C | 15.0°C | 9.6°C | 30.6°C | 2.6°C | 85 mm | 76% | 2.2 m/s | 3 |
| 2013 | 21.6°C | 15.4°C | 9.2°C | 27.0°C | 3.7°C | 11 mm | 69% | 2.1 m/s | 3.4 |
| 2012 | 21.0°C | 14.8°C | 8.5°C | 27.9°C | 3.5°C | 29 mm | 75% | 1.9 m/s | 3.6 |
| 2011 | 20.0°C | 13.8°C | 7.7°C | 25.1°C | 5.0°C | 54 mm | 76% | 1.9 m/s | 3.6 |
| 2010 | 21.6°C | 15.8°C | 10.0°C | 27.0°C | 4.5°C | 58 mm | 76% | 2.1 m/s | 3.2 |
| 2009 | 21.1°C | 14.6°C | 8.2°C | 30.9°C | 0.7°C | 46 mm | 65% | 2.2 m/s | 3.5 |
| 2008 | 20.9°C | 14.3°C | 7.6°C | 27.6°C | 2.1°C | 14 mm | 66% | 2 m/s | 3.5 |
| 2007 | 22.8°C | 16.2°C | 9.7°C | 28.3°C | 6.7°C | 36 mm | 66% | 1.9 m/s | 4 |
| 2006 | 18.8°C | 12.7°C | 6.6°C | 26.5°C | 3.1°C | 48 mm | 69% | 2.4 m/s | 3.1 |
| 2005 | 24.9°C | 17.6°C | 10.3°C | 33.0°C | 5.8°C | 20 mm | 59% | 2.4 m/s | 3.9 |
| 2004 | 22.5°C | 15.8°C | 9.1°C | 32.0°C | 5.3°C | 27 mm | 63% | 2.4 m/s | 3.5 |
| 2003 | 21.6°C | 15.3°C | 9.0°C | 28.0°C | 4.3°C | 71 mm | 70% | 2.2 m/s | 3.4 |
| 2002 | 23.5°C | 16.7°C | 9.9°C | 29.5°C | 4.0°C | 23 mm | 67% | 2.1 m/s | 3.5 |
| 2001 | 21.2°C | 14.8°C | 8.5°C | 28.8°C | 4.5°C | 60 mm | 68% | 2.2 m/s | 3.5 |
| 2000 | 21.6°C | 15.3°C | 8.9°C | 27.5°C | 4.5°C | 47 mm | 69% | 2.1 m/s | 3.7 |
| 1999 | 20.3°C | 13.7°C | 7.1°C | 25.5°C | 2.3°C | 29 mm | 70% | 2.2 m/s | 3.9 |
| 1998 | 20.4°C | 13.7°C | 7.1°C | 29.3°C | 3.6°C | 77 mm | 69% | 2.2 m/s | 3.4 |
| 1997 | 22.0°C | 14.8°C | 7.6°C | 28.3°C | 3.6°C | 11 mm | 61% | 2.1 m/s | 3.6 |
| 1996 | 18.0°C | 12.3°C | 6.6°C | 26.8°C | 4.1°C | 55 mm | 76% | 2.3 m/s | 3 |
| 1995 ❄️ | 17.7°C | 11.7°C | 5.8°C | 23.8°C | 1.9°C | 87 mm | 73% | 2.4 m/s | 3.3 |
| 1994 | 21.4°C | 14.9°C | 8.5°C | 27.4°C | 4.1°C | 21 mm | 67% | 2.3 m/s | 3.5 |
| 1993 | 22.9°C | 15.7°C | 8.5°C | 27.5°C | 5.5°C | 9 mm | 67% | 2 m/s | 3.9 |
| 1992 | 20.8°C | 14.6°C | 8.5°C | 29.6°C | 1.6°C | 50 mm | 69% | 2.4 m/s | 3.5 |
| 1991 | 20.6°C | 14.1°C | 7.5°C | 27.5°C | 2.5°C | 24 mm | 65% | 2.2 m/s | 3.7 |
| 1990 | 21.5°C | 15.6°C | 9.7°C | 29.9°C | 4.5°C | 74 mm | 73% | 2.7 m/s | 3.2 |
| 1989 | 20.6°C | 15.3°C | 10.1°C | 27.2°C | 5.9°C | 68 mm | 80% | 1.8 m/s | 3.2 |
| 1988 | 23.3°C | 16.7°C | 10.0°C | 28.5°C | 4.9°C | 26 mm | 65% | 2.4 m/s | 3.6 |
| 1987 | 22.3°C | 15.2°C | 8.1°C | 29.8°C | 2.1°C | 41 mm | 66% | 2.1 m/s | 3.7 |
| 1986 | 21.1°C | 14.7°C | 8.3°C | 35.1°C | 3.5°C | 69 mm | 64% | 2.7 m/s | 3.4 |
| 1985 | 22.3°C | 16.2°C | 10.0°C | 32.4°C | 4.4°C | 41 mm | 68% | 2 m/s | 3.7 |
| 1984 | 20.6°C | 14.0°C | 7.5°C | 26.0°C | 4.1°C | 45 mm | 70% | 2.1 m/s | 3.6 |
| 1983 | 18.1°C | 12.4°C | 6.7°C | 22.7°C | 1.9°C | 62 mm | 73% | 2.3 m/s | — |
| 1982 | 21.4°C | 14.7°C | 7.9°C | 28.6°C | 2.4°C | 33 mm | 66% | 2.1 m/s | — |
| 1981 | 22.4°C | 15.7°C | 8.9°C | 28.6°C | 2.0°C | 9 mm | 67% | 2.2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 21.3°C with lows near 8.6°C (mean 15°C), based on 45 years of NASA POWER data.
April averages 44 mm of rainfall in Seymour, about average for rainfall. The wettest on record was 173 mm in 2020.
The hottest April reached 35.1°C in 1986. The coldest dipped to 0.7°C in 2009.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.8°C. Daytime highs moved from 21°C to 21.6°C and overnight lows from 8.2°C to 9.3°C over the same span.
April is one of the warmer months of the year in Seymour and about average for rainfall, so plan for around 21.3°C daytime highs and 8.6°C at night.
Not quite — April is the 7th coolest month in Seymour, averaging 15°C.
For April in Seymour, pack light layers you can adjust through the day, with typical highs of 21.3°C and lows of 8.6°C.
Relative humidity in April averages 69% — moderately humid.
Average wind speed in April is 2.2 m/s. The windiest April on record averaged 2.7 m/s (1986).
The wettest April on record was 2020 with 173 mm. On average, April sees 44 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 Seymour 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.
