Helena, MT
Montana · Records since 1880–2026
Records for August 11
🔥 Record High
August 11, 2018
+12° from 86° normal❄ Record Low
August 11, 1997
-14° from 54° normalAll-Time Records — Helena
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 98°F | August 11, 2018 |
| 2 | 97°F | August 11, 1996 |
| 3 | 96°F | August 11, 2022 |
| 4 | 96°F | August 11, 2015 |
| 5 | 96°F | August 11, 2014 |
| 6 | 96°F | August 11, 1897 |
| 7 | 95°F | August 11, 2021 |
| 8 | 95°F | August 11, 1967 |
| 9 | 95°F | August 11, 1942 |
| 10 | 95°F | August 11, 1940 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 40°F | August 11, 1997 |
| 2 | 40°F | August 11, 1977 |
| 3 | 40°F | August 11, 1947 |
| 4 | 43°F | August 11, 1953 |
| 5 | 43°F | August 11, 1896 |
Heat Wave Summary — Helena
threshold: 92°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date151 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1880–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Helena
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 8, 2024 – Jul 25, 2024 | 18 | 102°F (Jul 23) | 97°F | 62°F |
| 2 | Jul 11, 2007 – Jul 23, 2007 | 13 | 102°F (Jul 14) | 98°F | 63°F |
| 3 | Jun 30, 1985 – Jul 12, 1985 | 13 | 101°F (Jul 9) | 96°F | 61°F |
| 4 | Aug 8, 2022 – Aug 20, 2022 | 13 | 99°F (Aug 16) | 95°F | 60°F |
| 5 | Aug 10, 1967 – Aug 20, 1967 | 11 | 97°F (Aug 19) | 95°F | 54°F |
| 6 | Jul 15, 2003 – Jul 24, 2003 | 10 | 104°F (Jul 23) | 99°F | 63°F |
| 7 | Jul 20, 2006 – Jul 29, 2006 | 10 | 102°F (Jul 23) | 98°F | 61°F |
| 8 | Jun 26, 2015 – Jul 4, 2015 | 9 | 103°F (Jun 27) | 98°F | 62°F |
| 9 | Jul 24, 2026 – Aug 1, 2026 | 9 | 103°F (Aug 1) | 96°F | 59°F |
| 10 | Jul 27, 2022 – Aug 4, 2022 | 9 | 102°F (Aug 1) | 98°F | 62°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
Above-Normal Summer Nights Per Year
Average June–August Low by Decade
Overnight lows · complete decades only
Precipitation
Actual vs. 1991–2020 full-month and full-season normals
Monthly Precipitation — Last 24 Months
Blue = actual · dashed line = monthly normal
Annual Precipitation Per Year (1970–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Heavy Rain Days Per Year (≥ 1.0")
Compare year-to-year changes in days with heavy rainfall (≥ 1.0")
Month in Review — July 2026
Average temperature · July 2026
12th-warmest month on record
10th-warmest July of 147 on record
+3.1° vs. 70.5° average (1991–2020)Longest 90°F Streak in July
10 consecutive days with highs of at least 90°F (Jul 22–31, 2026, peaking at 102°F)
The longest July streak since 2024 (2 years). The July record is 18 days, set in 2021.
Average July Temperature by Year
1880–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2007 | 78.8°F |
| 2 | 2021 | 77.6°F |
| 3 | 2017 | 76.7°F |
| 4 | 2003 | 76.4°F |
| 5 | 2006 | 75.4°F |
| 6 | 1985 | 74.9°F |
| 7 | 1936 | 74.7°F |
| 8 | 2024 | 74.6°F |
| 9 | 2022 | 73.6°F |
| 10 | 2026 | 73.5°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2007 | 78.8°F |
| 2 | July 2021 | 77.6°F |
| 3 | July 2017 | 76.7°F |
| 4 | July 2003 | 76.4°F |
| 5 | July 2006 | 75.4°F |
| 6 | August 2022 | 75.3°F |
| 7 | July 1985 | 74.9°F |
| 8 | July 1936 | 74.7°F |
| 9 | August 2001 | 74.7°F |
| 10 | July 2024 | 74.6°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Helena, MT | 73.5°F | 10th of 147 |
| Great Falls, MT | 72.1°F | 21st of 133 |
| Missoula, MT | 71.9°F | 15th of 123 |
| Salmon, ID | 72.5°F | 8th of 108 |