June is one of the warmer months of the year in Richland, with average highs near 27.6°C and lows around 12.8°C (mean 20.2°C). It is about average for rainfall, averaging 17 mm of rainfall and 46% relative humidity across the period.
June is one of the warmer months of the year in Richland. Across 45 years of records, the warmest June in Richland was 2021 — when the month averaged 24.9°C — while the coldest was 1991 at 17.2°C. Typical June days reach 27.6°C with nights near 12.8°C. The long-term trend is warming, about 0.4°C per decade.
June is about average for rainfall in Richland, averaging 17 mm of rainfall. The wettest June on record was 2012 with 47 mm, while the driest was 2003 at 0 mm.
Relative humidity in Richland during June averages 46%. The most humid June was 1984 at 54%, and the least humid was 2015 at 37%.
June receives about 7.2 kWh/m²/day of solar energy in Richland. The sunniest June was 2003 at 7.9 kWh/m²/day, and the cloudiest were 1991 and 1995 at 6.5.
Average wind speed in Richland during June is 2.5 m/s. The windiest June was 1981 at 3 m/s, while the calmest was 2006 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.0°C | 19.4°C | 20.3°C | 20.3°C | 21.2°C | +1.2°C |
| Avg High | 27.4°C | 26.6°C | 27.8°C | 27.7°C | 28.8°C | +1.4°C |
| Avg Low | 12.6°C | 12.2°C | 12.8°C | 12.9°C | 13.6°C | +1°C |
| Avg Rain | 15 mm | 18 mm | 17 mm | 18 mm | 16 mm | +1 mm |
June temperatures in Richland have risen by about 2.4°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 4°C (1984) to a record high of 46.5°C (2021).
Rainfall in June is about average for rainfall, averaging 17 mm, with a wettest year of 47 mm.
One of the best times to visit Richland
June is one of the best times to visit Richland. Expect days averaging 27.6°C and nights around 12.8°C (mean 20.2°C) — warmer than Richland's yearly average — with low rainfall (17 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 | 29.0°C | 20.8°C | 12.6°C | 37.9°C | 7.5°C | 2 mm | 43% | 2.2 m/s | 7.8 |
| 2024 | 27.7°C | 20.1°C | 12.4°C | 35.4°C | 6.6°C | 21 mm | 44% | 2.6 m/s | 7.4 |
| 2023 | 29.3°C | 21.7°C | 14.1°C | 36.5°C | 8.8°C | 6 mm | 44% | 2.2 m/s | 7.4 |
| 2022 | 26.6°C | 19.6°C | 12.6°C | 38.4°C | 7.5°C | 44 mm | 52% | 2.4 m/s | 6.8 |
| 2021 🔥 | 32.8°C | 24.9°C | 17.1°C | 46.5°C | 8.5°C | 5 mm | 37% | 2.5 m/s | 7.8 |
| 2020 | 27.2°C | 20.1°C | 12.9°C | 37.6°C | 7.8°C | 19 mm | 48% | 2.6 m/s | 6.9 |
| 2019 | 28.6°C | 21.0°C | 13.4°C | 36.8°C | 7.9°C | 6 mm | 42% | 2.4 m/s | 7.6 |
| 2018 | 27.5°C | 20.2°C | 12.8°C | 33.4°C | 7.5°C | 8 mm | 44% | 2.5 m/s | 7.4 |
| 2017 | 28.3°C | 20.7°C | 13.1°C | 38.5°C | 7.6°C | 9 mm | 46% | 2.5 m/s | 7.4 |
| 2016 | 28.7°C | 21.1°C | 13.6°C | 39.9°C | 7.0°C | 14 mm | 43% | 2.6 m/s | 7.5 |
| 2015 | 33.0°C | 24.8°C | 16.6°C | 42.2°C | 10.8°C | 2 mm | 37% | 2.2 m/s | 7.8 |
| 2014 | 27.2°C | 20.0°C | 12.7°C | 32.7°C | 8.4°C | 11 mm | 44% | 2.4 m/s | 7.3 |
| 2013 | 27.2°C | 20.2°C | 13.2°C | 37.1°C | 9.4°C | 32 mm | 48% | 2.2 m/s | 6.8 |
| 2012 🌧️ | 24.9°C | 18.3°C | 11.6°C | 32.6°C | 6.3°C | 47 mm | 51% | 2.7 m/s | 6.6 |
| 2011 | 25.6°C | 18.4°C | 11.1°C | 32.5°C | 6.4°C | 11 mm | 49% | 2.6 m/s | 7.2 |
| 2010 | 25.5°C | 18.4°C | 11.3°C | 33.2°C | 7.0°C | 37 mm | 51% | 2.4 m/s | 6.9 |
| 2009 | 28.6°C | 21.1°C | 13.6°C | 34.3°C | 9.4°C | 11 mm | 44% | 2.5 m/s | 7.2 |
| 2008 | 27.1°C | 19.0°C | 11.0°C | 40.4°C | 5.7°C | 16 mm | 45% | 2.6 m/s | 7.3 |
| 2007 | 26.7°C | 19.6°C | 12.5°C | 37.6°C | 8.3°C | 21 mm | 45% | 2.6 m/s | 7.1 |
| 2006 | 28.0°C | 20.7°C | 13.4°C | 40.0°C | 9.2°C | 32 mm | 50% | 2 m/s | 7 |
| 2005 | 26.7°C | 19.5°C | 12.2°C | 35.7°C | 7.7°C | 9 mm | 44% | 2.6 m/s | 7.2 |
| 2004 | 28.9°C | 21.3°C | 13.7°C | 37.2°C | 7.6°C | 26 mm | 44% | 2.4 m/s | 7.5 |
| 2003 | 30.0°C | 21.9°C | 13.8°C | 37.7°C | 8.3°C | 0 mm | 40% | 2.4 m/s | 7.9 |
| 2002 | 28.7°C | 21.1°C | 13.4°C | 39.9°C | 6.4°C | 22 mm | 45% | 2.6 m/s | 7.1 |
| 2001 | 25.5°C | 18.5°C | 11.4°C | 36.4°C | 6.1°C | 20 mm | 45% | 2.3 m/s | 6.8 |
| 2000 | 28.2°C | 20.5°C | 12.8°C | 37.0°C | 7.5°C | 14 mm | 45% | 2.8 m/s | 7.3 |
| 1999 | 26.2°C | 19.0°C | 11.8°C | 36.3°C | 5.9°C | 5 mm | 46% | 2.8 m/s | 7.1 |
| 1998 | 27.3°C | 19.9°C | 12.5°C | 35.3°C | 9.1°C | 11 mm | 49% | 2.5 m/s | 7.5 |
| 1997 | 26.0°C | 19.2°C | 12.4°C | 32.8°C | 8.7°C | 12 mm | 51% | 2.4 m/s | 7.3 |
| 1996 | 26.6°C | 18.9°C | 11.2°C | 32.1°C | 6.8°C | 12 mm | 48% | 2.2 m/s | 7.5 |
| 1995 | 25.5°C | 18.6°C | 11.7°C | 34.8°C | 6.8°C | 31 mm | 52% | 2.5 m/s | 6.5 |
| 1994 | 27.0°C | 19.3°C | 11.6°C | 35.3°C | 6.8°C | 15 mm | 45% | 2.5 m/s | 7.2 |
| 1993 | 25.6°C | 18.8°C | 12.0°C | 35.2°C | 7.8°C | 15 mm | 49% | 2.6 m/s | 6.6 |
| 1992 | 30.4°C | 22.9°C | 15.4°C | 41.5°C | 9.2°C | 31 mm | 44% | 2.1 m/s | 7 |
| 1991 ❄️ | 24.0°C | 17.2°C | 10.5°C | 32.6°C | 4.5°C | 32 mm | 51% | 2.3 m/s | 6.5 |
| 1990 | 27.1°C | 19.9°C | 12.7°C | 34.9°C | 7.9°C | 11 mm | 47% | 2.8 m/s | 6.9 |
| 1989 | 28.5°C | 21.3°C | 14.1°C | 34.3°C | 9.7°C | 3 mm | 43% | 2.6 m/s | 7.2 |
| 1988 | 26.8°C | 19.7°C | 12.6°C | 35.8°C | 7.1°C | 16 mm | 48% | 2.2 m/s | 6.6 |
| 1987 | 30.2°C | 21.9°C | 13.7°C | 39.3°C | 6.0°C | 8 mm | 42% | 2.1 m/s | 7.2 |
| 1986 | 30.3°C | 22.4°C | 14.5°C | 38.1°C | 8.4°C | 2 mm | 41% | 2.3 m/s | 7.3 |
| 1985 | 27.9°C | 20.0°C | 12.1°C | 37.2°C | 7.4°C | 14 mm | 43% | 2.7 m/s | 7.4 |
| 1984 | 24.5°C | 17.4°C | 10.4°C | 33.3°C | 4.0°C | 29 mm | 54% | 2.2 m/s | 6.6 |
| 1983 | 25.4°C | 18.4°C | 11.4°C | 33.3°C | 8.0°C | 19 mm | 51% | 2.6 m/s | — |
| 1982 | 28.5°C | 21.2°C | 14.0°C | 36.4°C | 7.5°C | 20 mm | 49% | 2.1 m/s | — |
| 1981 | 24.9°C | 17.8°C | 10.6°C | 33.6°C | 5.4°C | 24 mm | 51% | 3 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 27.6°C with lows near 12.8°C (mean 20.2°C), based on 45 years of NASA POWER data.
June averages 17 mm of rainfall in Richland, about average for rainfall. The wettest on record was 47 mm in 2012.
The hottest June reached 46.5°C in 2021. The coldest dipped to 4°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.4°C. Daytime highs moved from 26.2°C to 29.1°C and overnight lows from 11.7°C to 13.8°C over the same span.
June is one of the warmer months of the year in Richland and about average for rainfall, so plan for around 27.6°C daytime highs and 12.8°C at night.
Not quite — June is the 10th coolest month in Richland, averaging 20.2°C.
For June in Richland, pack light layers you can adjust through the day, with typical highs of 27.6°C and lows of 12.8°C.
Relative humidity in June averages 46% — relatively dry.
Average wind speed in June is 2.5 m/s. The windiest June on record averaged 3 m/s (1981).
The wettest June on record was 2012 with 47 mm. On average, June sees 17 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 Richland 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.
