Yosemite Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Yosemite National Park, California during each month of the year.
The average high and low temperatures are listed below for Yosemite Valley Park Headquarters, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 70, 80 or 90 °F monthly and annually in Yosemite, scroll down farther. There are also monthly and yearly counts of days with cold weather.
All the numbers are averages, based on climate data gathered from 1991 to 2020.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 48 | 29 | January | 9 | -2 |
| 51 | 30 | February | 11 | -1 |
| 57 | 34 | March | 14 | 1 |
| 63 | 38 | April | 17 | 3 |
| 71 | 45 | May | 21 | 7 |
| 81 | 51 | June | 27 | 11 |
| 89 | 57 | July | 32 | 14 |
| 89 | 57 | August | 32 | 14 |
| 83 | 51 | September | 28 | 11 |
| 71 | 41 | October | 22 | 5 |
| 56 | 33 | November | 13 | 0 |
| 46 | 28 | December | 8 | -2 |
| 67 | 41 | Year | 19 | 5 |
Days of Hot Weather in Yosemite
Summer temperatures can get hot at Yosemite Valley. Normally all but a couple of days in summer heat up to at least 80 Fahrenheit, with about half making it to 90 degrees or more. Once a year on average, a day in July or August will reach 100 °F (38 °C).
| 70 °F 21 °C |
80 °F 27 °C |
90 °F 32 °C |
|
|---|---|---|---|
| January | 0 | 0 | 0 |
| February | 0 | 0 | 0 |
| March | 3 | 0 | 0 |
| April | 10 | 1 | 0 |
| May | 21 | 7 | 0 |
| June | 27 | 19 | 5 |
| July | 31 | 30 | 17 |
| August | 31 | 30 | 17 |
| September | 28 | 22 | 7 |
| October | 21 | 8 | 1 |
| November | 3 | 0 | 0 |
| December | 0 | 0 | 0 |
| Year | 174 | 116 | 46 |
How Often Yosemite Has Cold Temperatures
Freezing temperatures usually show up from October to May at Yosemite Valley, including most winter nights. Typically six nights a year drop as low as 20 °F. But the cold is rarely severe, as only about once a decade is a temperature of 10 °F (-12 °C) or less recorded here.
Despite frequent frosty nights, it almost always thaws out here during the day. On average just one day a year at Yosemite stays below freezing.
| 20 °F -8 °C |
32 °F 0 °C |
|
|---|---|---|
| January | 2 | 25 |
| February | 1 | 18 |
| March | 0 | 14 |
| April | 0 | 6 |
| May | 0 | 1 |
| June | 0 | 0 |
| July | 0 | 0 |
| August | 0 | 0 |
| September | 0 | 0 |
| October | 0 | 3 |
| November | 0 | 15 |
| December | 2 | 25 |
| Year | 6 | 106 |
Reference
NOAA National Centers for Environmental Information (NCEI). Climate Normals.