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What is Yellowstone National Park, WY, Weather Like in August?
During the month of August, Yellowstone National Park, WY,
has an average daytime high temperature of 80°F and an average overnight low temperature dropping to 47°F.
Around 1.05 inches of precipitation is received during the month,
with about 10.19 inches falling in a typical year.
As you might expect, snow is not common in the month of August.
Annually, Yellowstone National Park receives around 43.70 inches of snow.
August 2025: Actual vs. Average Temperatures
Complete month data for August 2025
Actual High
Average High
Actual Low
Average Low
Month Summary
Average High: 80 F
(+0.2 vs avg)
Average Low: 49.9 F
(+3.4 vs avg)
Nighttime temperatures were significantly above average.
Actual data from: MID_YLAW4
Yellowstone National Park, WY Daily Weather Averages for August
Recorded at Yellowstone Park Mammoth
(usc00489905),
0.1 miles
NW of
Yellowstone National Park, WY
| Day | Avg Temps (°F) | Precip (in) | Snow (in) | Degree Days (°F) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | Mean | Month | Year | Month | Year | Heat | Cool | |
| 8/1 | 49 F | 83 F | 66 F | 0.04" | 9.18" | 0.00" | 43.70" | 1.4 F | 2.4 F |
| 8/2 | 49 F | 83 F | 66 F | 0.08" | 9.22" | 0.00" | 43.70" | 1.5 F | 2.4 F |
| 8/3 | 49 F | 83 F | 66 F | 0.12" | 9.26" | 0.00" | 43.70" | 1.6 F | 2.3 F |
| 8/4 | 49 F | 83 F | 66 F | 0.15" | 9.29" | 0.00" | 43.70" | 1.6 F | 2.3 F |
| 8/5 | 49 F | 83 F | 66 F | 0.19" | 9.33" | 0.00" | 43.70" | 1.7 F | 2.2 F |
| 8/6 | 48 F | 82 F | 65 F | 0.23" | 9.37" | 0.00" | 43.70" | 1.8 F | 2.1 F |
| 8/7 | 48 F | 82 F | 65 F | 0.27" | 9.41" | 0.00" | 43.70" | 1.8 F | 2.1 F |
| 8/8 | 48 F | 82 F | 65 F | 0.31" | 9.45" | 0.00" | 43.70" | 1.9 F | 2 F |
| 8/9 | 48 F | 82 F | 65 F | 0.35" | 9.49" | 0.00" | 43.70" | 2 F | 1.9 F |
| 8/10 | 48 F | 82 F | 65 F | 0.38" | 9.52" | 0.00" | 43.70" | 2.2 F | 1.9 F |
| 8/11 | 48 F | 81 F | 65 F | 0.42" | 9.56" | 0.00" | 43.70" | 2.3 F | 1.8 F |
| 8/12 | 47 F | 81 F | 64 F | 0.45" | 9.59" | 0.00" | 43.70" | 2.5 F | 1.8 F |
| 8/13 | 47 F | 81 F | 64 F | 0.49" | 9.63" | 0.00" | 43.70" | 2.6 F | 1.7 F |
| 8/14 | 47 F | 81 F | 64 F | 0.52" | 9.66" | 0.00" | 43.70" | 2.7 F | 1.6 F |
| 8/15 | 47 F | 80 F | 64 F | 0.56" | 9.70" | 0.00" | 43.70" | 2.9 F | 1.5 F |
| 8/16 | 47 F | 80 F | 63 F | 0.59" | 9.73" | 0.00" | 43.70" | 3 F | 1.4 F |
| 8/17 | 47 F | 80 F | 63 F | 0.62" | 9.76" | 0.00" | 43.70" | 3.2 F | 1.4 F |
| 8/18 | 46 F | 80 F | 63 F | 0.66" | 9.80" | 0.00" | 43.70" | 3.4 F | 1.3 F |
| 8/19 | 46 F | 79 F | 63 F | 0.69" | 9.83" | 0.00" | 43.70" | 3.6 F | 1.3 F |
| 8/20 | 46 F | 79 F | 62 F | 0.72" | 9.86" | 0.00" | 43.70" | 3.8 F | 1.2 F |
| 8/21 | 46 F | 79 F | 62 F | 0.75" | 9.89" | 0.00" | 43.70" | 3.9 F | 1.1 F |
| 8/22 | 45 F | 78 F | 62 F | 0.78" | 9.92" | 0.00" | 43.70" | 4.1 F | 1 F |
| 8/23 | 45 F | 78 F | 62 F | 0.81" | 9.95" | 0.00" | 43.70" | 4.3 F | 1 F |
| 8/24 | 45 F | 78 F | 61 F | 0.84" | 9.98" | 0.00" | 43.70" | 4.6 F | 0.9 F |
| 8/25 | 45 F | 77 F | 61 F | 0.87" | 10.01" | 0.00" | 43.70" | 4.8 F | 0.9 F |
| 8/26 | 45 F | 77 F | 61 F | 0.90" | 10.04" | 0.00" | 43.70" | 5 F | 0.8 F |
| 8/27 | 44 F | 77 F | 61 F | 0.93" | 10.07" | 0.00" | 43.70" | 5.2 F | 0.7 F |
| 8/28 | 44 F | 76 F | 60 F | 0.96" | 10.10" | 0.00" | 43.70" | 5.5 F | 0.7 F |
| 8/29 | 44 F | 76 F | 60 F | 0.99" | 10.13" | 0.00" | 43.70" | 5.8 F | 0.7 F |
| 8/30 | 44 F | 76 F | 60 F | 1.02" | 10.16" | 0.00" | 43.70" | 6 F | 0.7 F |
| 8/31 | 43 F | 75 F | 59 F | 1.05" | 10.19" | 0.00" | 43.70" | 6.3 F | 0.7 F |
