Montana weather in August: Statewide normals and every place, NOAA 1991-2020
In August, Montana's statewide normal high is 81°F and normal low 50°F; normal highs run from 71°F in Cooke City to 90°F in Hardin (NOAA 1991-2020 normals).
- Statewide normal high
- 81°FAugust, 1991-2020
- Statewide normal low
- 50°FAugust, 1991-2020
- Statewide normal precipitation
- 1.22 inAugust
- Warmest place
- 90°Fnormal high, Hardin
- Coolest place
- 71°Fnormal high, Cooke City
Where is Montana warmest and wettest in August?
Hardin has the warmest August afternoons (90°F) and Cooke City the coolest (71°F). Cooke City gets the most precipitation (1.82 in) and Bridger the least (0.61 in).
Statewide, August averaged 64.7°F in 2021, 69.7°F in 2022, 66.8°F in 2023, 65.8°F in 2024, 66.2°F in 2025, 66.5°F in 2026, against a 1991-2020 normal of 65.4°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Billings | 86°F | 58°F | 0.87 | 0.0 |
| Missoula | 84°F | 50°F | 0.83 | 0.0 |
| Great Falls | 83°F | 50°F | 1.22 | 0.3 |
| Bozeman | 84°F | 47°F | 0.94 | – |
| Butte | 80°F | 44°F | 1.28 | – |
| Helena | 85°F | 53°F | 1.04 | 0.3 |
| Kalispell | 82°F | 46°F | 0.76 | 0.0 |
| Anaconda | 82°F | 47°F | 1.20 | 0.2 |
| Whitefish | 80°F | 48°F | 0.89 | 0.0 |
| Havre | 85°F | 52°F | 0.92 | 0.0 |
| Livingston | 85°F | 48°F | 1.07 | – |
| Miles City | 87°F | 58°F | 0.91 | – |
| Lewistown | 81°F | 50°F | 1.69 | – |
| Sidney | 86°F | 55°F | 1.30 | 0.0 |
| Polson | 82°F | 53°F | 0.76 | – |
| Hamilton | 82°F | 48°F | 0.80 | – |
| Glendive | 87°F | 58°F | 1.53 | 0.0 |
| Dillon | 81°F | 46°F | 0.87 | – |
| Hardin | 90°F | 53°F | 0.86 | 0.0 |
| Shelby | 82°F | 49°F | 0.85 | 0.0 |
| Libby | 84°F | 48°F | – | – |
| Glasgow | 85°F | 57°F | 1.27 | 0.0 |
| Deer Lodge | 79°F | 42°F | 1.32 | – |
| Cut Bank | 80°F | 48°F | 0.96 | – |
| Red Lodge | 81°F | 49°F | 1.01 | 0.0 |
| Wolf Point | 86°F | 54°F | 1.50 | – |
| Conrad | 82°F | 50°F | 0.99 | 0.3 |
| Big Sky | 77°F | 39°F | 1.56 | – |
| Stevensville | 84°F | 47°F | 0.81 | 0.0 |
| Townsend | 83°F | 50°F | 1.10 | 0.0 |
| Colstrip | 84°F | 55°F | 1.03 | 0.0 |
| Roundup | 88°F | 51°F | 1.21 | 0.0 |
| Columbus | 84°F | 48°F | 0.93 | 0.0 |
| Malta | 86°F | 56°F | 1.27 | – |
| Choteau | 81°F | 47°F | 1.06 | 0.0 |
| Baker | 85°F | 54°F | 1.49 | – |
| Big Timber | 85°F | 51°F | 0.99 | 0.0 |
| Forsyth | 87°F | 56°F | 1.19 | 0.0 |
| Plentywood | 82°F | 51°F | 1.46 | – |
| Eureka | 86°F | 51°F | 1.05 | 0.0 |
| Thompson Falls | 86°F | 52°F | 0.89 | 0.0 |
| Fort Benton | 86°F | 52°F | 1.16 | 0.0 |
| Seeley Lake | 83°F | 43°F | 0.96 | 0.0 |
| Boulder | 82°F | 46°F | 1.12 | – |
| West Yellowstone | 78°F | 36°F | 1.39 | – |
| Chinook | 83°F | 52°F | 1.14 | – |
| Ennis | 82°F | 44°F | 1.02 | 0.0 |
| White Sulphur Springs | 81°F | 47°F | 1.21 | – |
| Scobey | 84°F | 49°F | 1.69 | 0.0 |
| Harlowton | 83°F | 48°F | 1.25 | 0.0 |
| Superior | 88°F | 49°F | 1.05 | – |
| Troy | 86°F | 48°F | 0.71 | – |
| Darby | 81°F | 48°F | 0.90 | – |
| Lincoln | 81°F | 42°F | 1.04 | – |
| Chester | 82°F | 50°F | 1.09 | 0.0 |
| St. Ignatius | 86°F | 51°F | 1.17 | – |
| Fairfield | 79°F | 52°F | 1.05 | – |
| Gardiner | 86°F | 52°F | 0.98 | – |
| Harlem | 85°F | 52°F | 0.99 | – |
| Bridger | 86°F | 50°F | 0.61 | 0.0 |
| Culbertson | 87°F | 54°F | 1.40 | – |
| Hungry Horse | 81°F | 52°F | 1.23 | – |
| Joliet | 84°F | 48°F | 0.88 | 0.0 |
| Big Sandy | 85°F | 53°F | 0.99 | – |
| Circle | 87°F | 55°F | 1.40 | – |
| Cascade | 85°F | 50°F | 1.17 | 0.2 |
| Terry | 87°F | 56°F | 1.31 | 0.0 |
| Alberton | 87°F | 47°F | 0.91 | 0.0 |
| Valier | 81°F | 51°F | 1.33 | – |
| Huntley | 86°F | 53°F | 0.85 | 0.0 |
| Busby | 88°F | 51°F | 1.01 | 0.0 |
| Broadus | 90°F | 56°F | 1.28 | – |
| Wibaux | 84°F | 51°F | 1.77 | 0.0 |
| Stanford | 81°F | 52°F | 1.61 | – |
| Ekalaka | 85°F | 55°F | 1.35 | 0.0 |
| Twin Bridges | 83°F | 43°F | 0.75 | – |
| Fortine | 83°F | 47°F | 0.92 | 0.0 |
| Jordan | 86°F | 53°F | 1.08 | – |
| Sunburst | 81°F | 52°F | 1.22 | – |
| St. Regis | 87°F | 45°F | – | – |
| Trout Creek | 85°F | 47°F | 0.86 | 0.0 |
| St. Marie | 84°F | 56°F | 1.32 | – |
| Heron | 82°F | 46°F | 0.89 | 0.0 |
| Yaak | 81°F | 42°F | 0.93 | – |
| Drummond | 85°F | 43°F | 0.82 | 0.2 |
| Nashua | 88°F | 56°F | – | – |
| Joplin | 82°F | 50°F | 1.05 | 0.0 |
| Hysham | 86°F | 55°F | 1.16 | 0.0 |
| Wyola | 87°F | 49°F | 0.67 | – |
| Virginia City | 81°F | 49°F | 1.14 | 0.0 |
| Hinsdale | 84°F | 54°F | 1.11 | – |
| Savage | 88°F | 55°F | 1.46 | 0.0 |
| Medicine Lake | 83°F | 53°F | 1.54 | – |
| Fort Peck | 88°F | 57°F | 1.40 | – |
| Ryegate | 85°F | 51°F | – | – |
| Swan Lake | 82°F | 46°F | – | – |
| Augusta | 82°F | 50°F | 1.18 | – |
| Wilsall | 82°F | 47°F | 1.13 | – |
| Lima | 81°F | 46°F | 1.02 | 0.0 |
| Denton | 83°F | 48°F | 1.46 | – |
| Highwood | 84°F | 55°F | 1.20 | – |
| St. Mary | 73°F | 45°F | 1.28 | – |
| West Glacier | 79°F | 48°F | 1.17 | 0.0 |
| Elliston | 80°F | 44°F | 1.39 | – |
| Geraldine | 86°F | 53°F | 1.28 | – |
| Winifred | 83°F | 52°F | 1.48 | – |
| Plevna | 86°F | 54°F | 1.35 | 0.0 |
| Westby | 80°F | 52°F | 1.64 | – |
| Saco | 82°F | 53°F | 1.35 | – |
| Melstone | 87°F | 56°F | 1.10 | 0.0 |
| Logan | 83°F | 46°F | 1.20 | – |
| Roy | 86°F | 53°F | 1.29 | 0.0 |
| Gildford | 82°F | 49°F | 1.05 | – |
| Olney | 80°F | 41°F | 1.08 | – |
| Wisdom | 77°F | 34°F | 0.79 | – |
| Grass Range | 83°F | 52°F | 1.67 | 0.0 |
| Judith Gap | 80°F | 49°F | 1.49 | 0.0 |
| Rapelje | 84°F | 51°F | 1.06 | 0.0 |
| Cooke City | 71°F | 38°F | 1.82 | 0.0 |
| Silver Gate | 73°F | 37°F | – | – |
| Loma | 87°F | 51°F | 1.17 | 0.0 |
| Zortman | 79°F | 52°F | 1.45 | – |
| Glen | 85°F | 41°F | 0.85 | 0.0 |
| Vida | 85°F | 55°F | 1.35 | – |
| Nye | 83°F | 47°F | 1.15 | 0.0 |
| Polebridge | 82°F | 38°F | – | – |
| Ovando | 80°F | 40°F | 0.91 | – |
| Neihart | 81°F | 47°F | – | – |
| Raynesford | 83°F | 51°F | 1.51 | – |
| Lakeview | 77°F | 41°F | 1.16 | – |
| Martinsdale | 83°F | 45°F | 1.16 | 0.1 |
| Biddle | 88°F | 55°F | 1.14 | 0.0 |
| Sula | 81°F | 40°F | 1.07 | – |
| Haugan | 83°F | 41°F | 1.17 | – |
| Jackson | 76°F | 39°F | 0.90 | – |
| Moccasin | 82°F | 50°F | 1.68 | 0.0 |
| Redstone | 82°F | 49°F | 1.80 | – |
| Norris | 85°F | 56°F | 1.41 | 0.0 |
| Bynum | 79°F | 51°F | 1.32 | – |
| Potomac | 82°F | 39°F | 0.62 | 0.0 |
| Brockway | 85°F | 54°F | 1.14 | – |
| Adel | 78°F | 46°F | – | – |
| Albion (1 mi N) | 83°F | 48°F | 1.95 | 0.0 |
| Alder (17 mi S) | 80°F | 47°F | 1.24 | 0.0 |
| Alder (19 mi S) | 79°F | 44°F | 1.21 | – |
| Austin (1 mi W) | 78°F | 47°F | 1.09 | – |
| Bigfork (13 mi S) | 79°F | 54°F | 1.11 | – |
| Blackleaf | 80°F | 44°F | – | – |
| Brady 27 ENE (The Knees) | 83°F | 53°F | 1.13 | 0.0 |
| Brandenberg | 89°F | 53°F | 0.91 | 0.0 |
| Bredette | 83°F | 52°F | 1.32 | 0.0 |
| Carlyle (13 mi NW) | 82°F | 55°F | 1.37 | 0.0 |
| Carter (14 mi W) | 83°F | 50°F | 1.19 | 0.0 |
| Chinook (35 mi SE) | 80°F | 50°F | 1.13 | – |
| Cohagen | 85°F | 52°F | 1.12 | 0.0 |
| Content (4 mi NNE) | 85°F | 51°F | 1.31 | – |
| Creston | 81°F | 49°F | 0.94 | 0.0 |
| Del Bonita | 76°F | 47°F | 1.12 | – |
| Divide | 80°F | 44°F | 1.02 | 0.0 |
| Dunkirk (19 mi NNE) | 81°F | 49°F | 0.88 | – |
| East Glacier | 74°F | 44°F | 1.46 | – |
| Flatwillow (4 mi ENE) | 86°F | 54°F | 1.14 | 0.0 |
| Fort Assiniboine | 84°F | 52°F | 0.96 | 0.0 |
| Fort Belknap (2 mi SW) | 84°F | 52°F | 1.23 | – |
| Gibson (2 mi NE) | 83°F | 48°F | 1.12 | 0.2 |
| Gibson Dam | 78°F | 43°F | 1.33 | – |
| Goldbutte (7 mi N) | 80°F | 46°F | 1.54 | 0.4 |
| Great Falls 16ST | 84°F | 53°F | 1.30 | – |
| Hebgen Dam | 78°F | 43°F | 1.38 | 0.0 |
| Holter Dam | 85°F | 50°F | 1.16 | 0.0 |
| Hysham (25 mi SSE) | 87°F | 51°F | 0.87 | 0.0 |
| Ingomar (9 mi E) | 88°F | 52°F | 1.02 | 0.0 |
| Laurin (2 mi NE) | 79°F | 50°F | 1.16 | – |
| Lennep (5 mi SW) | 77°F | 41°F | 1.32 | 0.0 |
| Lewistown (42 mi WSW) | 77°F | 44°F | 1.40 | – |
| Libby (32 mi SSE) | 78°F | 40°F | 0.84 | 0.0 |
| Libby Dam (Base) | 85°F | 49°F | 0.70 | – |
| Lindbergh Lake | 78°F | 49°F | 1.04 | 0.0 |
| Malta (35 mi S) | 85°F | 53°F | 1.21 | 0.0 |
| Melville (4 mi W) | 75°F | 45°F | 1.38 | – |
| Mildred (5 mi N) | 87°F | 53°F | 1.26 | – |
| Millegan (14 mi SE) | 80°F | 45°F | 1.44 | 0.0 |
| Mizpah (4 mi NNW) | 91°F | 53°F | 1.02 | 0.0 |
| Moorhead (9 mi NE) | 87°F | 53°F | 1.25 | 0.0 |
| Mosby (4 mi ENE) | 87°F | 58°F | 1.18 | – |
| Mystic Lake | 74°F | 50°F | 1.86 | 0.0 |
| Opheim (10 mi N) | 81°F | 49°F | 1.57 | 0.0 |
| Opheim (12 mi SSE) | 77°F | 46°F | 1.08 | 0.0 |
| Phillipsburg Ranger Station | 81°F | 42°F | 1.13 | – |
| Pompeys Pillar (15 mi N) | 85°F | 52°F | 0.90 | 0.0 |
| Port Of Morgan | 83°F | 52°F | 1.29 | 0.0 |
| Powderville (8 mi NNE) | 89°F | 57°F | 1.23 | 0.0 |
| Raymond Border Station | 81°F | 53°F | 1.78 | 0.0 |
| Ridgeway (1 mi S) | 84°F | 55°F | 1.65 | 0.0 |
| Rock Springs | 86°F | 55°F | 1.04 | – |
| Rogers Pass (9 mi NNE) | 81°F | 49°F | 1.24 | – |
| Rudyard (19 mi S) | 81°F | 49°F | 1.15 | – |
| Rudyard (21 mi N) | 83°F | 46°F | 1.07 | – |
| SKQ Dam | 83°F | 51°F | 0.89 | 0.0 |
| Sand Creek | 84°F | 54°F | – | – |
| Shonkin (7 mi S) | 79°F | 51°F | 1.69 | – |
| Simpson 6 N - Wildhorse | 83°F | 49°F | 1.23 | 0.0 |
| Sonnette (7 mi SW) | 86°F | 51°F | 1.10 | 0.0 |
| Sun River (4 mi S) | 82°F | 47°F | 1.01 | – |
| Sweetgrass | 82°F | 51°F | – | – |
| Tiber Dam | 85°F | 51°F | 1.07 | – |
| Tizer Gardens | 82°F | 43°F | 1.31 | – |
| Trident | 84°F | 51°F | 0.98 | – |
| Turner (11 mi N) | 84°F | 51°F | 1.03 | 0.0 |
| Valentine | 85°F | 52°F | 1.40 | 0.0 |
| Western Agricultural Research Center | 84°F | 48°F | 0.84 | – |
| Wise River (3 mi WNW) | 79°F | 36°F | 0.99 | – |
| Wolf Point (29 mi ENE) | 84°F | 51°F | 1.38 | – |
| Wolf Point (34 mi NE) | 80°F | 56°F | 1.26 | – |
| Yellowtail Dam | 87°F | 57°F | 0.78 | 0.0 |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.