Mammoth Lakes, CA weather in August
Mammoth Lakes is mild and dry in August: highs average 77°F and nights drop to about 47°F. There are about 2 days with rain. This is the peak of the warm season in Mammoth Lakes. A great month for outdoor plans.
- Normal high
- 77°F
- Normal low
- 47°F
- Wet days
- 2
- 0.5 in total
- Daylight
- 13.6 h
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 79°F | 76°F |
| Normal low | 49°F | 45°F |
| Sunrise / sunset | 5:59 am / 8:04 pm | 6:25 am / 7:27 pm |
| Daylight | 14.1 h | 13.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)23 of 31
- Hot dayshigh 90°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow2 of 31
- Notable rainat least 0.10 in1 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 0.5 in. Days with half an inch or more are rare.
How August varies from year to year
- Warmest August, 1991-20202008: average high 80°F
- Coolest August2014: average high 74°F
- Wettest August1998: 1.5 in
- Driest August1994: no measurable precipitation
- Highest reading88°F (August 18, 2008)
- Lowest reading30°F (August 31, 2010)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 78°F | 77°F | 71°F |
| Normal low | 49°F | 47°F | 40°F |
| Wet days | 4 | 2 | 2 |
| Comfortable days | 20 | 23 | 24 |
| Daylight | 14.5 h | 13.6 h | 12.4 h |
Highs change by -1°F from July and -6°F into September.
Nearby alternatives in August
- Warmer: Yosemite Valley, CA34 mi · high 89°F · 1 wet day
- Cooler: Salinas, CA162 mi · high 72°F · 1 wet day
How Mammoth Lakes ranks in August
- Normal high338th warmest of 378 cities; 47th of 60 in California
- Wet days61st driest of 378
What to pack for Mammoth Lakes in August
- Layers – afternoons near 77°F but nights near 47°F
Heating and cooling
August has 104 heating degree days and 23 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Mammoth Lakes in August?
The normal high is 77°F and the normal low is 47°F. From 1991 to 2020 the hottest August reading was 88°F (most recently on August 18, 2008).
Does it rain a lot in Mammoth Lakes in August?
About 2 days in August have at least 0.01 in of precipitation, and the normal total is 0.5 in. The wettest August in 1991-2020 was in 1998 (1.5 in); the driest was in 1994, with no measurable precipitation.
Is August a good time to visit Mammoth Lakes?
August ranks 2nd of 12 months on our comfort score for Mammoth Lakes (85 out of 100). It has about 23 comfortable days (judged by temperature only). The best months are June, August and September.
Where the numbers come from
- Temperature, rain and frost dates: Mammoth Lakes RS (USC00045280), 0.6 mi E of the city center, 7,804 ft (69 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Lee Vining (USC00044881), 23 mi NNW of the city center, 6,797 ft (1,076 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Not available for this location: humidity and wind by hour, cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).