June is one of the warmer months of the year in Nampa, with average highs near 27.7°C and lows around 12°C (mean 19.9°C). It is about average for rainfall, averaging 23 mm of rainfall and 42% relative humidity across the period.
June is one of the warmer months of the year in Nampa. Across 45 years of records, the warmest June in Nampa was 2021 — when the month averaged 24.4°C — while the coldest were 1984 and 1993 at 16.7°C. Typical June days reach 27.7°C with nights near 12°C. The long-term trend is warming, about 0.4°C per decade.
June is about average for rainfall in Nampa, averaging 23 mm of rainfall. The wettest June on record was 2020 with 72 mm, while the driest was 1994 at 2 mm.
Relative humidity in Nampa during June averages 42%. The most humid June was 1998 at 53%, and the least humid was 2021 at 34%.
June receives about 7.5 kWh/m²/day of solar energy in Nampa. The sunniest Junes were 2003 and 2021 at 8.4 kWh/m²/day, and the cloudiest was 1993 at 6.5.
Average wind speed in Nampa during June is 2.2 m/s. The windiest Junes were 2000, 2001 and 2014 at 2.5 m/s, while the calmest was 2023 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.9°C | 18.7°C | 20.1°C | 20.2°C | 20.8°C | +0.9°C |
| Avg High | 27.8°C | 26.3°C | 28.1°C | 28.1°C | 28.6°C | +0.8°C |
| Avg Low | 11.9°C | 11.0°C | 12.0°C | 12.2°C | 13.1°C | +1.2°C |
| Avg Rain | 23 mm | 27 mm | 22 mm | 17 mm | 33 mm | +10 mm |
June temperatures in Nampa have risen by about 2.8°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 2.4°C (2011) to a record high of 43.8°C (2015).
Rainfall in June is about average for rainfall, averaging 23 mm, with a wettest year of 72 mm.
One of the best times to visit Nampa
June is one of the best times to visit Nampa. Expect days averaging 27.7°C and nights around 12°C (mean 19.9°C) — warmer than Nampa's yearly average — with low rainfall (23 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 | 29.5°C | 21.4°C | 13.4°C | 37.3°C | 7.7°C | 7 mm | 37% | 2.2 m/s | 8 |
| 2024 | 30.0°C | 21.7°C | 13.3°C | 37.7°C | 6.3°C | 17 mm | 40% | 2.2 m/s | 7.8 |
| 2023 | 25.6°C | 19.0°C | 12.5°C | 35.2°C | 4.5°C | 41 mm | 52% | 1.8 m/s | 7 |
| 2022 | 27.5°C | 19.7°C | 12.0°C | 39.6°C | 4.8°C | 39 mm | 45% | 2 m/s | 7.2 |
| 2021 🔥 | 33.2°C | 24.4°C | 15.5°C | 40.9°C | 7.7°C | 20 mm | 34% | 2.3 m/s | 8.4 |
| 2020 🌧️ | 25.7°C | 18.7°C | 11.7°C | 38.0°C | 5.3°C | 72 mm | 50% | 2.3 m/s | 6.7 |
| 2019 | 27.4°C | 19.7°C | 12.0°C | 33.5°C | 4.2°C | 10 mm | 42% | 2.1 m/s | 7.9 |
| 2018 | 27.9°C | 20.1°C | 12.3°C | 34.6°C | 5.9°C | 18 mm | 42% | 2.3 m/s | 7.7 |
| 2017 | 28.1°C | 20.3°C | 12.5°C | 37.5°C | 4.4°C | 33 mm | 46% | 2.2 m/s | 7.3 |
| 2016 | 30.4°C | 22.2°C | 13.9°C | 39.6°C | 6.8°C | 5 mm | 34% | 2.2 m/s | 7.9 |
| 2015 | 32.6°C | 24.3°C | 16.0°C | 43.8°C | 9.3°C | 5 mm | 36% | 2.2 m/s | 7.8 |
| 2014 | 27.4°C | 19.4°C | 11.5°C | 34.2°C | 5.7°C | 9 mm | 39% | 2.5 m/s | 7.7 |
| 2013 | 29.3°C | 21.0°C | 12.7°C | 40.7°C | 6.7°C | 14 mm | 38% | 2.1 m/s | 7.7 |
| 2012 | 27.7°C | 19.3°C | 10.9°C | 36.4°C | 4.2°C | 9 mm | 39% | 2.3 m/s | 7.8 |
| 2011 | 24.5°C | 17.1°C | 9.6°C | 34.6°C | 2.4°C | 26 mm | 49% | 2.2 m/s | 7.3 |
| 2010 | 25.4°C | 18.1°C | 10.8°C | 38.0°C | 4.9°C | 37 mm | 50% | 2.3 m/s | 6.9 |
| 2009 | 25.6°C | 18.9°C | 12.2°C | 36.5°C | 6.2°C | 62 mm | 51% | 1.9 m/s | 6.7 |
| 2008 | 27.3°C | 19.1°C | 10.8°C | 39.6°C | 4.5°C | 19 mm | 39% | 2.3 m/s | 7.8 |
| 2007 | 29.1°C | 20.7°C | 12.3°C | 36.6°C | 6.6°C | 22 mm | 36% | 2.3 m/s | 7.7 |
| 2006 | 29.0°C | 21.1°C | 13.1°C | 38.1°C | 9.0°C | 24 mm | 45% | 2 m/s | 7.3 |
| 2005 | 25.1°C | 17.7°C | 10.2°C | 37.3°C | 3.9°C | 33 mm | 45% | 2.2 m/s | 7.3 |
| 2004 | 28.4°C | 20.5°C | 12.6°C | 36.7°C | 6.6°C | 17 mm | 42% | 2.2 m/s | 7.8 |
| 2003 | 29.5°C | 21.1°C | 12.7°C | 38.6°C | 7.1°C | 5 mm | 36% | 2.4 m/s | 8.4 |
| 2002 | 29.0°C | 21.0°C | 13.0°C | 40.1°C | 3.6°C | 13 mm | 37% | 2.3 m/s | 7.5 |
| 2001 | 28.2°C | 19.7°C | 11.3°C | 37.1°C | 4.2°C | 10 mm | 36% | 2.5 m/s | 7.6 |
| 2000 | 29.5°C | 20.9°C | 12.3°C | 37.5°C | 6.6°C | 8 mm | 36% | 2.5 m/s | 7.8 |
| 1999 | 26.4°C | 19.1°C | 11.7°C | 37.1°C | 4.0°C | 16 mm | 43% | 2.4 m/s | 7.4 |
| 1998 | 24.3°C | 17.1°C | 9.9°C | 33.1°C | 5.3°C | 41 mm | 53% | 2.2 m/s | 7.4 |
| 1997 | 26.5°C | 19.2°C | 11.8°C | 34.3°C | 7.8°C | 33 mm | 48% | 2.4 m/s | 7.2 |
| 1996 | 27.9°C | 19.7°C | 11.4°C | 36.1°C | 5.6°C | 8 mm | 42% | 2.2 m/s | 7.7 |
| 1995 | 24.7°C | 17.6°C | 10.5°C | 33.6°C | 3.7°C | 37 mm | 50% | 2.2 m/s | 6.6 |
| 1994 | 28.9°C | 20.4°C | 11.9°C | 37.8°C | 4.7°C | 2 mm | 34% | 2.2 m/s | 7.6 |
| 1993 | 24.0°C | 16.7°C | 9.3°C | 36.4°C | 3.6°C | 50 mm | 51% | 2.3 m/s | 6.5 |
| 1992 | 28.7°C | 21.1°C | 13.5°C | 37.3°C | 5.3°C | 50 mm | 42% | 2.2 m/s | 6.8 |
| 1991 | 24.4°C | 16.8°C | 9.1°C | 33.2°C | 4.9°C | 23 mm | 45% | 2.3 m/s | 7 |
| 1990 | 27.5°C | 19.4°C | 11.3°C | 39.1°C | 2.5°C | 10 mm | 42% | 2.2 m/s | 7.5 |
| 1989 | 28.5°C | 20.5°C | 12.6°C | 35.7°C | 9.3°C | 5 mm | 38% | 2.1 m/s | 7.7 |
| 1988 | 30.0°C | 21.8°C | 13.5°C | 40.0°C | 7.1°C | 17 mm | 39% | 2.3 m/s | 7 |
| 1987 | 30.2°C | 21.6°C | 13.0°C | 38.1°C | 4.4°C | 26 mm | 39% | 2 m/s | 7.2 |
| 1986 | 30.8°C | 22.8°C | 14.8°C | 38.1°C | 8.2°C | 9 mm | 39% | 2.1 m/s | 7.8 |
| 1985 | 29.1°C | 20.5°C | 12.0°C | 35.6°C | 5.5°C | 9 mm | 35% | 2.4 m/s | 7.6 |
| 1984 ❄️ | 24.5°C | 16.7°C | 9.0°C | 38.4°C | 3.2°C | 49 mm | 50% | 2.2 m/s | 6.9 |
| 1983 | 25.3°C | 17.8°C | 10.3°C | 33.1°C | 5.2°C | 21 mm | 49% | 2.4 m/s | — |
| 1982 | 26.1°C | 19.1°C | 12.1°C | 34.8°C | 3.7°C | 41 mm | 50% | 1.9 m/s | — |
| 1981 | 25.9°C | 18.0°C | 10.0°C | 37.0°C | 3.0°C | 26 mm | 47% | 2.2 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 27.7°C with lows near 12°C (mean 19.9°C), based on 45 years of NASA POWER data.
June averages 23 mm of rainfall in Nampa, about average for rainfall. The wettest on record was 72 mm in 2020.
The hottest June reached 43.8°C in 2015. The coldest dipped to 2.4°C in 2011.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.8°C. Daytime highs moved from 26.2°C to 29.2°C and overnight lows from 10.7°C to 13.3°C over the same span.
June is one of the warmer months of the year in Nampa and about average for rainfall, so plan for around 27.7°C daytime highs and 12°C at night.
Not quite — June is the 10th coolest month in Nampa, averaging 19.9°C.
For June in Nampa, pack light layers you can adjust through the day, with typical highs of 27.7°C and lows of 12°C.
Relative humidity in June averages 42% — relatively dry.
Average wind speed in June is 2.2 m/s. The windiest June on record averaged 2.5 m/s (2000).
The wettest June on record was 2020 with 72 mm. On average, June sees 23 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 Nampa 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.
