April is one of the cooler months of the year in Altoona, with average highs near 15.2°C and lows around 2.6°C (mean 8.9°C). It is about average for rainfall, averaging 89 mm of rainfall and 78% relative humidity across the period.
April is one of the cooler months of the year in Altoona. Across 45 years of records, the warmest April in Altoona was 2017 — when the month averaged 12.4°C — while the coldest were 1982 and 2018 at 5.9°C. Typical April days reach 15.2°C with nights near 2.6°C. The long-term trend is warming, about 0.4°C per decade.
April is about average for rainfall in Altoona, averaging 89 mm of rainfall. The wettest April on record was 2011 with 197 mm, while the driest was 1997 at 27 mm.
Relative humidity in Altoona during April averages 78%. The most humid April was 2011 at 86%, and the least humid was 2016 at 73%.
April receives about 4.6 kWh/m²/day of solar energy in Altoona. The sunniest Aprils were 1997, 2006 and 2010, among others at 5.2 kWh/m²/day, and the cloudiest was 2011 at 3.6.
Average wind speed in Altoona during April is 0.2 m/s. The windiest Aprils were 2022, 2023 and 2024, among others at 0.2 m/s, while the calmest were 2014, 2019 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.1°C | 8.5°C | 9.3°C | 9.3°C | 9.5°C | +1.4°C |
| Avg High | 14.3°C | 14.8°C | 15.6°C | 15.6°C | 15.7°C | +1.4°C |
| Avg Low | 1.8°C | 2.1°C | 2.9°C | 3.0°C | 3.3°C | +1.5°C |
| Avg Rain | 81 mm | 93 mm | 87 mm | 86 mm | 102 mm | +21 mm |
April temperatures in Altoona have risen by about 1.8°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -10.5°C (1982) to a record high of 29.7°C (2009).
Rainfall in April is about average for rainfall, averaging 89 mm, with a wettest year of 197 mm.
A good time to visit Altoona
April is a good time to visit Altoona, with days averaging 15.2°C and nights around 2.6°C (mean 8.9°C, close to Altoona's yearly average) and higher 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 | 16.8°C | 10.4°C | 4.0°C | 26.6°C | -5.2°C | 93 mm | 75% | 0.1 m/s | 4.4 |
| 2024 | 16.6°C | 10.7°C | 4.7°C | 27.3°C | -1.4°C | 173 mm | 81% | 0.2 m/s | 4.3 |
| 2023 | 17.8°C | 11.0°C | 4.2°C | 27.4°C | -3.8°C | 90 mm | 74% | 0.2 m/s | 4.6 |
| 2022 | 14.3°C | 8.0°C | 1.7°C | 28.6°C | -4.9°C | 68 mm | 76% | 0.2 m/s | 4.4 |
| 2021 | 16.0°C | 9.7°C | 3.4°C | 25.4°C | -5.5°C | 59 mm | 75% | 0.2 m/s | 4.6 |
| 2020 | 13.0°C | 7.3°C | 1.7°C | 21.5°C | -4.7°C | 129 mm | 77% | 0.2 m/s | 4.3 |
| 2019 | 16.1°C | 10.2°C | 4.3°C | 23.4°C | -4.6°C | 97 mm | 81% | 0.1 m/s | 4.3 |
| 2018 | 11.7°C | 5.9°C | 0.2°C | 25.7°C | -5.7°C | 100 mm | 78% | 0.2 m/s | 4.4 |
| 2017 🔥 | 18.9°C | 12.4°C | 5.9°C | 26.1°C | -3.1°C | 70 mm | 79% | 0.2 m/s | 4.7 |
| 2016 | 15.0°C | 8.5°C | 1.9°C | 24.7°C | -6.5°C | 44 mm | 73% | 0.2 m/s | 4.8 |
| 2015 | 15.6°C | 9.0°C | 2.4°C | 23.5°C | -4.5°C | 96 mm | 76% | 0.2 m/s | 4.7 |
| 2014 | 14.7°C | 8.1°C | 1.4°C | 24.0°C | -5.9°C | 89 mm | 79% | 0.1 m/s | 4.5 |
| 2013 | 15.5°C | 9.3°C | 3.2°C | 24.2°C | -5.1°C | 62 mm | 77% | 0.1 m/s | 4.8 |
| 2012 | 15.2°C | 8.7°C | 2.1°C | 26.9°C | -2.8°C | 47 mm | 74% | 0.1 m/s | 5.1 |
| 2011 🌧️ | 15.2°C | 9.7°C | 4.1°C | 25.3°C | -3.9°C | 197 mm | 86% | 0.1 m/s | 3.6 |
| 2010 | 18.3°C | 11.3°C | 4.3°C | 26.4°C | -0.8°C | 53 mm | 75% | 0.2 m/s | 5.2 |
| 2009 | 15.2°C | 9.0°C | 2.8°C | 29.7°C | -4.8°C | 84 mm | 78% | 0.2 m/s | 4.6 |
| 2008 | 16.7°C | 10.4°C | 4.2°C | 25.9°C | -4.0°C | 102 mm | 80% | 0.2 m/s | 4.6 |
| 2007 | 12.5°C | 7.1°C | 1.6°C | 24.8°C | -6.1°C | 91 mm | 79% | 0.2 m/s | 4 |
| 2006 | 17.3°C | 10.2°C | 3.1°C | 26.8°C | -4.6°C | 79 mm | 74% | 0.2 m/s | 5.2 |
| 2005 | 15.9°C | 9.3°C | 2.6°C | 24.7°C | -3.2°C | 52 mm | 77% | 0.2 m/s | 5 |
| 2004 | 14.6°C | 9.1°C | 3.6°C | 25.0°C | -4.9°C | 137 mm | 81% | 0.1 m/s | 4.3 |
| 2003 | 15.1°C | 8.8°C | 2.4°C | 24.7°C | -6.9°C | 63 mm | 81% | 0.1 m/s | 4.7 |
| 2002 | 16.3°C | 10.0°C | 3.6°C | 29.0°C | -5.5°C | 86 mm | 76% | 0.2 m/s | 4.6 |
| 2001 | 17.1°C | 9.8°C | 2.6°C | 28.0°C | -4.8°C | 70 mm | 75% | 0.2 m/s | 4.6 |
| 2000 | 15.2°C | 8.8°C | 2.4°C | 24.1°C | -4.2°C | 110 mm | 78% | 0.2 m/s | 4.3 |
| 1999 | 15.8°C | 9.1°C | 2.4°C | 24.5°C | -3.4°C | 113 mm | 76% | 0.1 m/s | 4.7 |
| 1998 | 15.3°C | 9.0°C | 2.7°C | 21.3°C | -3.2°C | 156 mm | 78% | 0.2 m/s | 4.9 |
| 1997 | 13.3°C | 7.0°C | 0.7°C | 21.8°C | -5.2°C | 27 mm | 74% | 0.2 m/s | 5.2 |
| 1996 | 14.0°C | 7.7°C | 1.4°C | 23.8°C | -4.8°C | 93 mm | 81% | 0.1 m/s | 4.3 |
| 1995 | 13.7°C | 7.2°C | 0.6°C | 22.2°C | -6.5°C | 61 mm | 76% | 0.2 m/s | 4.1 |
| 1994 | 16.8°C | 9.9°C | 3.0°C | 26.1°C | -5.2°C | 85 mm | 80% | 0.1 m/s | 5.2 |
| 1993 | 13.9°C | 7.7°C | 1.4°C | 22.2°C | -4.3°C | 186 mm | 82% | 0.1 m/s | 4.1 |
| 1992 | 14.0°C | 8.2°C | 2.4°C | 21.5°C | -6.1°C | 59 mm | 79% | 0.2 m/s | 4.3 |
| 1991 | 15.8°C | 9.9°C | 4.1°C | 24.6°C | -4.8°C | 78 mm | 82% | 0.1 m/s | 4.1 |
| 1990 | 15.4°C | 9.1°C | 2.8°C | 29.5°C | -5.2°C | 69 mm | 77% | 0.2 m/s | 4.5 |
| 1989 | 14.0°C | 7.2°C | 0.5°C | 23.1°C | -5.5°C | 30 mm | 76% | 0.2 m/s | 4.7 |
| 1988 | 13.9°C | 7.6°C | 1.3°C | 21.3°C | -4.3°C | 58 mm | 78% | 0.2 m/s | 4.7 |
| 1987 | 14.0°C | 8.7°C | 3.3°C | 25.1°C | -5.1°C | 121 mm | 82% | 0.2 m/s | 4.3 |
| 1986 | 14.8°C | 8.6°C | 2.4°C | 23.9°C | -3.8°C | 74 mm | 80% | 0.2 m/s | 4.6 |
| 1985 | 16.5°C | 10.6°C | 4.6°C | 27.1°C | -6.3°C | 28 mm | 78% | 0.2 m/s | 4.9 |
| 1984 | 13.2°C | 7.3°C | 1.5°C | 23.6°C | -4.2°C | 101 mm | 83% | 0.1 m/s | 4.2 |
| 1983 | 13.1°C | 7.6°C | 2.0°C | 23.7°C | -5.2°C | 153 mm | 81% | 0.1 m/s | — |
| 1982 ❄️ | 12.8°C | 5.9°C | -1.0°C | 23.2°C | -10.5°C | 59 mm | 74% | 0.2 m/s | — |
| 1981 | 16.8°C | 9.4°C | 2.0°C | 24.1°C | -5.9°C | 107 mm | 75% | 0.2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 15.2°C with lows near 2.6°C (mean 8.9°C), based on 45 years of NASA POWER data.
April averages 89 mm of rainfall in Altoona, about average for rainfall. The wettest on record was 197 mm in 2011.
The hottest April reached 29.7°C in 2009. 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 1.8°C. Daytime highs moved from 14.5°C to 16.3°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 Altoona and about average for rainfall, so plan for around 15.2°C daytime highs and 2.6°C at night.
Not quite — April is the 6th coolest month in Altoona, averaging 8.9°C.
For April in Altoona, pack warm layers and a jacket for chilly mornings, with typical highs of 15.2°C and lows of 2.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 78% — quite humid.
Average wind speed in April is 0.2 m/s. The windiest April on record averaged 0.2 m/s (1981).
The wettest April on record was 2011 with 197 mm. On average, April sees 89 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 Altoona 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.
