April is one of the cooler months of the year in Duncan, with average highs near 11.8°C and lows around 5.2°C (mean 8.5°C). It is one of the drier months, averaging 68 mm of rainfall and 79% relative humidity across the period.
April is one of the cooler months of the year in Duncan. Across 45 years of records, the warmest April in Duncan was 2016 — when the month averaged 11.4°C — while the coldest was 2011 at 6°C. Typical April days reach 11.8°C with nights near 5.2°C. The long-term April temperature trend is broadly flat.
April is one of the drier months in Duncan, averaging 68 mm of rainfall. The wettest April on record was 1996 with 154 mm, while the driest was 2004 at 17 mm.
Relative humidity in Duncan during April averages 79%. The most humid April was 1993 at 85%, and the least humid was 2004 at 73%.
April receives about 4.3 kWh/m²/day of solar energy in Duncan. The sunniest April was 2004 at 5.5 kWh/m²/day, and the cloudiest was 1986 at 3.7.
Average wind speed in Duncan during April is 1.5 m/s. The windiest April was 1984 at 1.9 m/s, while the calmest were 1990, 1998 and 2004, among others at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.2°C | 8.9°C | 8.4°C | 8.6°C | 8.3°C | +0.1°C |
| Avg High | 11.6°C | 12.2°C | 11.8°C | 11.8°C | 11.6°C | 0°C |
| Avg Low | 4.8°C | 5.5°C | 5.1°C | 5.3°C | 5.0°C | +0.2°C |
| Avg Rain | 83 mm | 79 mm | 53 mm | 69 mm | 53 mm | -30 mm |
April temperatures in Duncan have risen by about 0.5°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 0.4°C (2008) to a record high of 26.9°C (1998).
Rainfall in April is one of the drier months, averaging 68 mm, with a wettest year of 154 mm.
A good time to visit Duncan
April is a good time to visit Duncan, with days averaging 11.8°C and nights around 5.2°C (mean 8.5°C, cooler than Duncan'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 | 12.9°C | 9.5°C | 6.0°C | 18.5°C | 3.4°C | 46 mm | 79% | 1.4 m/s | 5.1 |
| 2024 | 11.5°C | 8.1°C | 4.7°C | 15.6°C | 2.3°C | 53 mm | 79% | 1.6 m/s | 4.6 |
| 2023 | 10.3°C | 7.4°C | 4.5°C | 20.6°C | 0.9°C | 74 mm | 82% | 1.7 m/s | 3.9 |
| 2022 | 9.4°C | 6.6°C | 3.8°C | 14.1°C | 1.6°C | 88 mm | 80% | 1.8 m/s | 4.2 |
| 2021 | 13.1°C | 9.2°C | 5.4°C | 20.7°C | 0.9°C | 28 mm | 74% | 1.4 m/s | 5.2 |
| 2020 | 12.6°C | 9.1°C | 5.7°C | 17.0°C | 1.3°C | 31 mm | 75% | 1.4 m/s | 4.8 |
| 2019 | 12.4°C | 9.1°C | 5.8°C | 16.5°C | 3.9°C | 72 mm | 80% | 1.6 m/s | 4.2 |
| 2018 | 11.8°C | 8.8°C | 5.7°C | 23.4°C | 2.1°C | 98 mm | 81% | 1.6 m/s | 3.8 |
| 2017 | 11.0°C | 8.2°C | 5.3°C | 13.9°C | 2.8°C | 99 mm | 83% | 1.8 m/s | 4 |
| 2016 🔥 | 15.2°C | 11.4°C | 7.6°C | 24.8°C | 4.6°C | 24 mm | 78% | 1.4 m/s | 4.7 |
| 2015 | 12.2°C | 8.6°C | 5.1°C | 20.4°C | 3.0°C | 46 mm | 78% | 1.6 m/s | 4.6 |
| 2014 | 12.2°C | 8.7°C | 5.2°C | 20.6°C | 3.3°C | 74 mm | 81% | 1.5 m/s | 4.5 |
| 2013 | 11.8°C | 8.5°C | 5.2°C | 16.9°C | 2.6°C | 70 mm | 78% | 1.6 m/s | 4.1 |
| 2012 | 11.3°C | 8.3°C | 5.3°C | 18.0°C | 2.1°C | 79 mm | 81% | 1.4 m/s | 4 |
| 2011 ❄️ | 9.0°C | 6.0°C | 3.0°C | 12.5°C | 1.0°C | 62 mm | 80% | 1.7 m/s | 4 |
| 2010 | 11.4°C | 8.2°C | 5.0°C | 15.5°C | 1.0°C | 67 mm | 79% | 1.8 m/s | 4.1 |
| 2009 | 12.3°C | 8.5°C | 4.6°C | 19.0°C | 1.2°C | 33 mm | 74% | 1.4 m/s | 4.8 |
| 2008 | 9.3°C | 6.2°C | 3.0°C | 16.5°C | 0.4°C | 35 mm | 77% | 1.5 m/s | 4.2 |
| 2007 | 11.0°C | 7.8°C | 4.6°C | 18.1°C | 0.8°C | 61 mm | 80% | 1.5 m/s | 4.1 |
| 2006 | 12.0°C | 8.7°C | 5.4°C | 20.0°C | 2.7°C | 59 mm | 79% | 1.5 m/s | 4.1 |
| 2005 | 12.7°C | 9.5°C | 6.3°C | 21.7°C | 2.3°C | 81 mm | 80% | 1.7 m/s | 4.5 |
| 2004 | 14.7°C | 10.7°C | 6.7°C | 23.3°C | 1.6°C | 17 mm | 73% | 1.3 m/s | 5.5 |
| 2003 | 10.9°C | 8.0°C | 5.1°C | 16.9°C | 2.3°C | 78 mm | 83% | 1.5 m/s | 3.9 |
| 2002 | 11.7°C | 8.3°C | 4.8°C | 19.2°C | 1.4°C | 57 mm | 78% | 1.5 m/s | 4.4 |
| 2001 | 11.1°C | 7.9°C | 4.8°C | 17.0°C | 1.6°C | 56 mm | 78% | 1.5 m/s | 4.2 |
| 2000 | 12.1°C | 8.7°C | 5.3°C | 18.6°C | 1.4°C | 50 mm | 79% | 1.5 m/s | 4.4 |
| 1999 | 11.6°C | 7.8°C | 4.1°C | 19.0°C | 0.7°C | 41 mm | 75% | 1.5 m/s | 4.7 |
| 1998 | 12.6°C | 8.9°C | 5.3°C | 26.9°C | 2.3°C | 25 mm | 74% | 1.3 m/s | 4.9 |
| 1997 | 11.6°C | 8.2°C | 4.9°C | 16.6°C | 2.2°C | 86 mm | 79% | 1.6 m/s | 4.5 |
| 1996 🌧️ | 11.8°C | 9.0°C | 6.2°C | 18.0°C | 2.1°C | 154 mm | 84% | 1.7 m/s | 3.9 |
| 1995 | 12.2°C | 8.9°C | 5.5°C | 18.1°C | 2.2°C | 51 mm | 76% | 1.5 m/s | 4.7 |
| 1994 | 13.2°C | 9.9°C | 6.5°C | 22.4°C | 2.2°C | 62 mm | 81% | 1.4 m/s | 3.9 |
| 1993 | 11.2°C | 8.4°C | 5.6°C | 15.3°C | 2.5°C | 117 mm | 85% | 1.7 m/s | 3.9 |
| 1992 | 12.8°C | 9.5°C | 6.2°C | 18.4°C | 2.0°C | 86 mm | 79% | 1.6 m/s | 4.2 |
| 1991 | 12.0°C | 8.4°C | 4.8°C | 18.1°C | 1.7°C | 98 mm | 77% | 1.5 m/s | 4.5 |
| 1990 | 13.4°C | 9.8°C | 6.2°C | 18.9°C | 4.2°C | 69 mm | 78% | 1.3 m/s | 4.2 |
| 1989 | 13.6°C | 9.8°C | 6.0°C | 22.1°C | 2.6°C | 61 mm | 77% | 1.3 m/s | 4.7 |
| 1988 | 12.4°C | 8.8°C | 5.3°C | 19.4°C | 1.2°C | 92 mm | 80% | 1.5 m/s | 3.9 |
| 1987 | 12.6°C | 9.0°C | 5.3°C | 22.6°C | 1.2°C | 53 mm | 79% | 1.5 m/s | 4.4 |
| 1986 | 10.4°C | 7.3°C | 4.2°C | 17.4°C | 2.2°C | 73 mm | 81% | 1.7 m/s | 3.7 |
| 1985 | 10.8°C | 7.5°C | 4.3°C | 16.2°C | 0.9°C | 71 mm | 80% | 1.6 m/s | 4.2 |
| 1984 | 10.7°C | 7.5°C | 4.3°C | 15.8°C | 1.5°C | 104 mm | 81% | 1.9 m/s | 4.1 |
| 1983 | 12.9°C | 9.2°C | 5.5°C | 19.1°C | 2.2°C | 67 mm | 74% | 1.3 m/s | — |
| 1982 | 9.6°C | 6.5°C | 3.3°C | 18.9°C | 0.5°C | 105 mm | 77% | 1.6 m/s | — |
| 1981 | 11.0°C | 7.8°C | 4.6°C | 18.1°C | 1.7°C | 123 mm | 82% | 1.8 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 11.8°C with lows near 5.2°C (mean 8.5°C), based on 45 years of NASA POWER data.
April averages 68 mm of rainfall in Duncan, one of the drier months. The wettest on record was 154 mm in 1996.
The hottest April reached 26.9°C in 1998. The coldest dipped to 0.4°C in 2008.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.5°C. Daytime highs moved from 11°C to 11.4°C and overnight lows from 4.4°C to 4.9°C over the same span.
April is one of the cooler months of the year in Duncan and one of the drier months, so plan for around 11.8°C daytime highs and 5.2°C at night.
Not quite — April is the 6th coolest month in Duncan, averaging 8.5°C.
For April in Duncan, pack warm layers and a jacket for chilly mornings, with typical highs of 11.8°C and lows of 5.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 79% — quite humid.
Average wind speed in April is 1.5 m/s. The windiest April on record averaged 1.9 m/s (1984).
The wettest April on record was 1996 with 154 mm. On average, April sees 68 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 Duncan 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.
