June is one of the warmer months of the year in Decatur, with average highs near 27.1°C and lows around 16.4°C (mean 21.8°C). It is a relatively wet time of year, averaging 112 mm of rainfall and 76% relative humidity across the period.
June is one of the warmer months of the year in Decatur. Across 45 years of records, the warmest June in Decatur was 2010 — when the month averaged 23.9°C — while the coldest was 1982 at 18.7°C. Typical June days reach 27.1°C with nights near 16.4°C. The long-term trend is warming, about 0.5°C per decade.
June is a relatively wet time of year in Decatur, averaging 112 mm of rainfall. The wettest June on record was 2010 with 230 mm, while the driest was 1988 at 18 mm.
Relative humidity in Decatur during June averages 76%. The most humid June was 2013 at 83%, and the least humid was 1988 at 51%.
June receives about 6.2 kWh/m²/day of solar energy in Decatur. The sunniest June was 2012 at 7.3 kWh/m²/day, and the cloudiest was 1985 at 5.3.
Average wind speed in Decatur during June is 2.6 m/s. The windiest June was 1990 at 3.2 m/s, while the calmest was 1995 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.2°C | 21.2°C | 21.6°C | 22.5°C | 22.7°C | +1.5°C |
| Avg High | 26.9°C | 26.3°C | 27.0°C | 27.7°C | 28.3°C | +1.4°C |
| Avg Low | 15.5°C | 16.1°C | 16.2°C | 17.4°C | 17.0°C | +1.5°C |
| Avg Rain | 90 mm | 120 mm | 107 mm | 138 mm | 97 mm | +7 mm |
June temperatures in Decatur have risen by about 2.2°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 3.8°C (2003) to a record high of 41.5°C (2012).
Rainfall in June is a relatively wet time of year, averaging 112 mm, with a wettest year of 230 mm.
One of the best times to visit Decatur
June is one of the best times to visit Decatur. Expect days averaging 27.1°C and nights around 16.4°C (mean 21.8°C) — warmer than Decatur's yearly average — with higher rainfall (112 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 28.2°C | 23.2°C | 18.1°C | 33.0°C | 9.9°C | 111 mm | 79% | 2.5 m/s | 5.9 |
| 2024 | 28.6°C | 23.0°C | 17.3°C | 32.6°C | 9.8°C | 55 mm | 73% | 3 m/s | 6.5 |
| 2023 | 29.1°C | 22.2°C | 15.3°C | 34.0°C | 7.8°C | 61 mm | 60% | 2.6 m/s | 6.5 |
| 2022 | 28.3°C | 22.4°C | 16.5°C | 32.6°C | 10.4°C | 38 mm | 72% | 2.5 m/s | 6.6 |
| 2021 | 28.0°C | 23.1°C | 18.2°C | 32.8°C | 9.6°C | 207 mm | 77% | 2.7 m/s | 6.2 |
| 2020 | 27.4°C | 22.1°C | 16.7°C | 30.3°C | 9.5°C | 109 mm | 78% | 2.6 m/s | 6.8 |
| 2019 | 26.2°C | 21.2°C | 16.3°C | 32.8°C | 9.3°C | 129 mm | 81% | 2.8 m/s | 5.9 |
| 2018 | 28.6°C | 23.7°C | 18.7°C | 32.0°C | 11.3°C | 178 mm | 80% | 2.2 m/s | 6.5 |
| 2017 | 27.6°C | 22.1°C | 16.5°C | 31.4°C | 10.6°C | 66 mm | 73% | 2.8 m/s | 7.1 |
| 2016 | 28.3°C | 23.0°C | 17.6°C | 32.1°C | 10.9°C | 103 mm | 76% | 2.4 m/s | 7.2 |
| 2015 | 26.7°C | 21.9°C | 17.2°C | 31.0°C | 8.8°C | 219 mm | 83% | 2.8 m/s | 5.5 |
| 2014 | 27.3°C | 22.6°C | 17.8°C | 30.0°C | 11.2°C | 176 mm | 80% | 2.9 m/s | 6.2 |
| 2013 | 26.0°C | 21.3°C | 16.6°C | 31.1°C | 8.5°C | 100 mm | 83% | 2.7 m/s | 5.7 |
| 2012 | 30.8°C | 23.5°C | 16.3°C | 41.5°C | 7.6°C | 27 mm | 57% | 2.9 m/s | 7.3 |
| 2011 | 27.2°C | 22.3°C | 17.4°C | 32.3°C | 11.2°C | 151 mm | 81% | 2.9 m/s | 5.8 |
| 2010 🔥 🌧️ | 28.3°C | 23.9°C | 19.5°C | 31.1°C | 13.1°C | 230 mm | 83% | 2.5 m/s | 6.4 |
| 2009 | 26.7°C | 22.0°C | 17.2°C | 31.8°C | 6.3°C | 146 mm | 83% | 2.5 m/s | 6.1 |
| 2008 | 27.0°C | 22.1°C | 17.1°C | 30.4°C | 11.5°C | 176 mm | 81% | 3.1 m/s | 6.5 |
| 2007 | 27.3°C | 21.9°C | 16.6°C | 32.2°C | 9.5°C | 107 mm | 76% | 2.5 m/s | 6.4 |
| 2006 | 27.1°C | 21.3°C | 15.4°C | 32.3°C | 9.0°C | 56 mm | 73% | 2.5 m/s | 6.5 |
| 2005 | 29.2°C | 23.6°C | 17.9°C | 35.7°C | 11.1°C | 44 mm | 73% | 2.6 m/s | 6.6 |
| 2004 | 26.1°C | 20.8°C | 15.5°C | 30.9°C | 8.3°C | 82 mm | 76% | 2.5 m/s | 6.6 |
| 2003 | 25.4°C | 19.6°C | 13.7°C | 31.4°C | 3.8°C | 101 mm | 73% | 2.6 m/s | 6.1 |
| 2002 | 27.6°C | 22.6°C | 17.5°C | 31.3°C | 11.1°C | 111 mm | 81% | 2.4 m/s | 6.4 |
| 2001 | 26.0°C | 20.6°C | 15.3°C | 31.1°C | 7.6°C | 89 mm | 76% | 2.5 m/s | 6.4 |
| 2000 | 27.1°C | 21.3°C | 15.4°C | 32.6°C | 7.0°C | 153 mm | 71% | 3.1 m/s | 5.6 |
| 1999 | 26.5°C | 21.5°C | 16.6°C | 31.2°C | 6.8°C | 130 mm | 80% | 2.4 m/s | 5.8 |
| 1998 | 25.9°C | 21.5°C | 17.2°C | 32.0°C | 7.3°C | 212 mm | 83% | 3 m/s | 5.6 |
| 1997 | 26.5°C | 21.3°C | 16.0°C | 32.0°C | 10.0°C | 91 mm | 78% | 2.6 m/s | 5.5 |
| 1996 | 26.4°C | 21.3°C | 16.2°C | 31.3°C | 9.5°C | 92 mm | 80% | 2.5 m/s | 6 |
| 1995 | 25.9°C | 20.9°C | 15.8°C | 29.6°C | 9.6°C | 86 mm | 81% | 2 m/s | 6.2 |
| 1994 | 26.6°C | 21.6°C | 16.5°C | 30.8°C | 7.8°C | 97 mm | 79% | 2.3 m/s | 6.2 |
| 1993 | 25.4°C | 20.5°C | 15.7°C | 29.9°C | 5.5°C | 187 mm | 83% | 2.7 m/s | 5.6 |
| 1992 | 25.3°C | 19.4°C | 13.5°C | 31.4°C | 4.9°C | 69 mm | 71% | 2.4 m/s | 6 |
| 1991 | 27.7°C | 22.5°C | 17.4°C | 31.5°C | 11.7°C | 43 mm | 78% | 2.3 m/s | 6.7 |
| 1990 | 26.4°C | 21.3°C | 16.2°C | 30.1°C | 6.6°C | 198 mm | 81% | 3.2 m/s | 5.7 |
| 1989 | 26.2°C | 20.6°C | 15.1°C | 30.4°C | 8.2°C | 46 mm | 75% | 2.3 m/s | 6.4 |
| 1988 | 30.8°C | 22.8°C | 14.8°C | 39.4°C | 6.3°C | 18 mm | 51% | 2.8 m/s | 6.8 |
| 1987 | 29.1°C | 23.1°C | 17.0°C | 36.0°C | 9.7°C | 87 mm | 69% | 2.5 m/s | 6.4 |
| 1986 | 27.2°C | 21.8°C | 16.4°C | 31.6°C | 8.1°C | 141 mm | 79% | 2.7 m/s | 6.1 |
| 1985 | 24.8°C | 19.3°C | 13.8°C | 30.2°C | 6.2°C | 128 mm | 78% | 2.7 m/s | 5.3 |
| 1984 | 27.1°C | 22.0°C | 16.8°C | 29.7°C | 10.7°C | 44 mm | 80% | 3 m/s | 6 |
| 1983 | 26.3°C | 21.2°C | 16.0°C | 30.3°C | 7.7°C | 108 mm | 79% | 2.3 m/s | — |
| 1982 ❄️ | 24.1°C | 18.7°C | 13.2°C | 28.8°C | 7.1°C | 87 mm | 76% | 2.4 m/s | — |
| 1981 | 26.8°C | 21.6°C | 16.4°C | 30.6°C | 10.8°C | 151 mm | 79% | 2.9 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 27.1°C with lows near 16.4°C (mean 21.8°C), based on 45 years of NASA POWER data.
June averages 112 mm of rainfall in Decatur, a relatively wet time of year. The wettest on record was 230 mm in 2010.
The hottest June reached 41.5°C in 2012. The coldest dipped to 3.8°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.2°C. Daytime highs moved from 25.8°C to 28.4°C and overnight lows from 15.2°C to 17.1°C over the same span.
June is one of the warmer months of the year in Decatur and a relatively wet time of year, so plan for around 27.1°C daytime highs and 16.4°C at night.
Not quite — June is the 10th coolest month in Decatur, averaging 21.8°C.
For June in Decatur, pack light layers you can adjust through the day, with typical highs of 27.1°C and lows of 16.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 76% — quite humid.
Average wind speed in June is 2.6 m/s. The windiest June on record averaged 3.2 m/s (1990).
The wettest June on record was 2010 with 230 mm. On average, June sees 112 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 Decatur behaves each June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
