June is one of the warmer months of the year in Decatur, with average highs near 29.8°C and lows around 19.1°C (mean 24.5°C). It is about average for rainfall, averaging 110 mm of rainfall and 75% 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 2007 — when the month averaged 26.9°C — while the coldest was 1983 at 22°C. Typical June days reach 29.8°C with nights near 19.1°C. The long-term trend is warming, about 0.3°C per decade.
June is about average for rainfall in Decatur, averaging 110 mm of rainfall. The wettest June on record was 1989 with 281 mm, while the driest was 1988 at 17 mm.
Relative humidity in Decatur during June averages 75%. The most humid June was 1997 at 86%, and the least humid was 1988 at 48%.
June receives about 6.2 kWh/m²/day of solar energy in Decatur. The sunniest Junes were 2006, 2008 and 2012 at 7 kWh/m²/day, and the cloudiest was 1997 at 5.
Average wind speed in Decatur during June is 0.9 m/s. The windiest June was 1998 at 1.1 m/s, while the calmest was 1991 at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.1°C | 24.0°C | 24.6°C | 25.0°C | 24.7°C | +0.6°C |
| Avg High | 29.7°C | 29.1°C | 30.3°C | 30.2°C | 29.9°C | +0.2°C |
| Avg Low | 18.6°C | 18.8°C | 19.0°C | 19.9°C | 19.4°C | +0.8°C |
| Avg Rain | 114 mm | 119 mm | 93 mm | 110 mm | 118 mm | +4 mm |
June temperatures in Decatur have risen by about 1.2°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 9.7°C (1998) to a record high of 40.9°C (2012).
Rainfall in June is about average for rainfall, averaging 110 mm, with a wettest year of 281 mm.
One of the best times to visit Decatur
June is one of the best times to visit Decatur. Expect days averaging 29.8°C and nights around 19.1°C (mean 24.5°C) — warmer than Decatur's yearly average — with higher rainfall (110 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 | 29.7°C | 24.9°C | 20.1°C | 34.5°C | 14.5°C | 170 mm | 81% | 0.8 m/s | 5.9 |
| 2024 | 31.8°C | 25.9°C | 20.0°C | 38.0°C | 14.1°C | 62 mm | 69% | 0.9 m/s | 6.7 |
| 2023 | 29.8°C | 24.1°C | 18.3°C | 35.6°C | 13.7°C | 76 mm | 72% | 0.9 m/s | 6.4 |
| 2022 | 31.9°C | 25.8°C | 19.8°C | 36.4°C | 14.4°C | 73 mm | 70% | 0.8 m/s | 6.9 |
| 2021 | 28.3°C | 23.8°C | 19.3°C | 31.6°C | 13.4°C | 203 mm | 82% | 1 m/s | 6 |
| 2020 | 28.1°C | 23.5°C | 18.9°C | 31.2°C | 11.9°C | 125 mm | 82% | 1 m/s | 6 |
| 2019 | 29.0°C | 24.1°C | 19.1°C | 32.5°C | 12.2°C | 111 mm | 79% | 0.9 m/s | 6.1 |
| 2018 | 29.9°C | 25.2°C | 20.6°C | 33.7°C | 14.8°C | 146 mm | 80% | 0.8 m/s | 6.5 |
| 2017 | 28.4°C | 23.6°C | 18.8°C | 31.4°C | 13.1°C | 156 mm | 79% | 1 m/s | 5.9 |
| 2016 | 31.9°C | 26.0°C | 20.2°C | 36.6°C | 14.1°C | 91 mm | 71% | 0.9 m/s | 6.7 |
| 2015 | 30.2°C | 25.2°C | 20.2°C | 34.4°C | 14.0°C | 51 mm | 78% | 0.8 m/s | 6.7 |
| 2014 | 28.8°C | 24.4°C | 20.1°C | 32.1°C | 15.8°C | 162 mm | 82% | 0.8 m/s | 5.8 |
| 2013 | 28.7°C | 24.0°C | 19.3°C | 31.3°C | 15.3°C | 124 mm | 83% | 0.9 m/s | 6.4 |
| 2012 | 32.1°C | 25.2°C | 18.3°C | 40.9°C | 12.2°C | 71 mm | 63% | 0.9 m/s | 7 |
| 2011 | 31.5°C | 26.2°C | 20.8°C | 34.2°C | 17.1°C | 114 mm | 75% | 0.9 m/s | 6.4 |
| 2010 | 31.0°C | 26.1°C | 21.1°C | 35.0°C | 15.5°C | 75 mm | 79% | 0.8 m/s | 6.3 |
| 2009 | 29.8°C | 24.8°C | 19.8°C | 32.5°C | 11.9°C | 66 mm | 79% | 0.8 m/s | 6.8 |
| 2008 | 31.4°C | 25.5°C | 19.6°C | 34.0°C | 14.3°C | 51 mm | 69% | 0.9 m/s | 7 |
| 2007 🔥 | 33.9°C | 26.9°C | 20.0°C | 37.0°C | 16.5°C | 60 mm | 55% | 0.9 m/s | 6.6 |
| 2006 | 31.4°C | 25.0°C | 18.5°C | 36.6°C | 11.8°C | 51 mm | 65% | 0.9 m/s | 7 |
| 2005 | 29.5°C | 24.3°C | 19.1°C | 34.3°C | 14.5°C | 115 mm | 76% | 0.9 m/s | 5.8 |
| 2004 | 29.5°C | 24.6°C | 19.7°C | 34.0°C | 12.6°C | 148 mm | 77% | 0.8 m/s | 5.2 |
| 2003 | 27.2°C | 22.3°C | 17.4°C | 31.9°C | 12.0°C | 126 mm | 83% | 0.9 m/s | 6 |
| 2002 | 30.8°C | 24.9°C | 19.0°C | 33.6°C | 14.9°C | 74 mm | 69% | 0.9 m/s | 6.4 |
| 2001 | 28.0°C | 22.7°C | 17.3°C | 32.3°C | 11.5°C | 143 mm | 78% | 0.9 m/s | 6.1 |
| 2000 | 31.6°C | 25.4°C | 19.2°C | 36.4°C | 10.5°C | 94 mm | 64% | 0.9 m/s | 6 |
| 1999 | 29.1°C | 24.0°C | 18.9°C | 33.0°C | 13.2°C | 163 mm | 76% | 1 m/s | 5.7 |
| 1998 | 31.4°C | 25.8°C | 20.3°C | 37.4°C | 9.7°C | 95 mm | 74% | 1.1 m/s | 6.6 |
| 1997 | 26.5°C | 22.3°C | 18.1°C | 30.7°C | 11.8°C | 239 mm | 86% | 0.9 m/s | 5 |
| 1996 | 30.1°C | 24.4°C | 18.6°C | 36.6°C | 13.8°C | 62 mm | 73% | 0.8 m/s | 6.1 |
| 1995 | 29.6°C | 23.7°C | 17.8°C | 34.0°C | 11.9°C | 75 mm | 71% | 0.9 m/s | 6.2 |
| 1994 | 29.3°C | 24.6°C | 20.0°C | 33.5°C | 16.9°C | 167 mm | 81% | 0.8 m/s | 6 |
| 1993 | 29.5°C | 24.3°C | 19.0°C | 32.4°C | 10.0°C | 54 mm | 77% | 0.8 m/s | 6.2 |
| 1992 | 27.8°C | 22.6°C | 17.4°C | 33.1°C | 10.4°C | 171 mm | 78% | 0.9 m/s | 5.6 |
| 1991 | 28.0°C | 24.0°C | 19.9°C | 31.9°C | 14.0°C | 90 mm | 83% | 0.7 m/s | 5.8 |
| 1990 | 29.4°C | 23.8°C | 18.3°C | 34.1°C | 11.1°C | 77 mm | 77% | 0.9 m/s | 6.6 |
| 1989 🌧️ | 26.8°C | 22.9°C | 19.0°C | 30.9°C | 13.3°C | 281 mm | 85% | 0.9 m/s | 5.1 |
| 1988 | 33.7°C | 25.8°C | 17.8°C | 39.0°C | 10.2°C | 17 mm | 48% | 0.9 m/s | 6.4 |
| 1987 | 30.2°C | 24.7°C | 19.2°C | 34.7°C | 13.8°C | 123 mm | 73% | 0.8 m/s | 6.2 |
| 1986 | 30.9°C | 25.3°C | 19.8°C | 36.1°C | 15.3°C | 94 mm | 72% | 0.8 m/s | 5.9 |
| 1985 | 29.6°C | 24.0°C | 18.5°C | 33.9°C | 9.8°C | 109 mm | 71% | 0.9 m/s | 6.1 |
| 1984 | 29.7°C | 24.1°C | 18.6°C | 32.8°C | 11.2°C | 68 mm | 75% | 0.8 m/s | 6.6 |
| 1983 ❄️ | 26.9°C | 22.0°C | 17.1°C | 30.4°C | 10.5°C | 116 mm | 83% | 0.9 m/s | — |
| 1982 | 28.0°C | 22.6°C | 17.2°C | 31.5°C | 12.4°C | 118 mm | 79% | 0.9 m/s | — |
| 1981 | 31.8°C | 25.8°C | 19.9°C | 37.5°C | 15.5°C | 100 mm | 71% | 1 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 29.8°C with lows near 19.1°C (mean 24.5°C), based on 45 years of NASA POWER data.
June averages 110 mm of rainfall in Decatur, about average for rainfall. The wettest on record was 281 mm in 1989.
The hottest June reached 40.9°C in 2012. The coldest dipped to 9.7°C in 1998.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1.2°C. Daytime highs moved from 29.2°C to 30.3°C and overnight lows from 18.3°C to 19.5°C over the same span.
June is one of the warmer months of the year in Decatur and about average for rainfall, so plan for around 29.8°C daytime highs and 19.1°C at night.
Not quite — June is the 10th coolest month in Decatur, averaging 24.5°C.
For June in Decatur, pack light layers you can adjust through the day, with typical highs of 29.8°C and lows of 19.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 75% — moderately humid.
Average wind speed in June is 0.9 m/s. The windiest June on record averaged 1.1 m/s (1998).
The wettest June on record was 1989 with 281 mm. On average, June sees 110 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.
