Yosemite weather
in September
“Mild and bright — an underrated time to visit.”
Roughly 5 rainy days across the month, on average.
In september, Yosemite settles into its quieter, cooler pace. The city keeps a different pulse than in summer or midwinter, and travellers who arrive with the right expectations are rewarded.
Days average around 18°C (64°F), cooling to 4°C after sunset. Rain is rare enough that you can plan without a contingency. Long days of sunshine reward early starts.
These figures are climatological averages, drawn from a decade of daily records via the Open-Meteo Archive — not a forecast. But they are honest, and they are the sort of thing a good travel guide ought to tell you before you book the flight.
What to pack for Yosemite in September
- •A properly warm coat — not a fashion piece
- •A light layer for cool mornings and evenings
- •Layers, because the day changes
- •A merino base layer for the cold evenings
- •Comfortable, broken-in walking shoes
- •A small daypack that won't look like a tourist beacon
What to pack for Yosemite in September
- →Breathable travel pantsAmazon · shop this
- →Reef-safe sunscreen SPF 50Amazon · shop this
- →Polarized sunglassesAmazon · shop this
- →Universal travel adapterAmazon · shop this
- →Compression packing cubesAmazon · shop this
- →Anti-theft crossbody bagAmazon · shop this
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Where to stay in Yosemite
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Yosemite in September — FAQ
Q01Is September a good time to visit Yosemite?
Is September a good time to visit Yosemite?
Yes — it is a good time to visit, with pleasant, comfortable weather. In September, Yosemite averages a high of 18°C (64°F) and a low of 4°C (40°F), with 22mm of rainfall across roughly 5 rainy days.
Q02What is the average temperature in Yosemite in September?
What is the average temperature in Yosemite in September?
The average high temperature in Yosemite during September is 18°C (64°F), with an average low of 4°C (40°F). These figures are averaged from ten years of daily records (2015–2024, Open-Meteo Archive).
Q03How many rainy days does Yosemite have in September?
How many rainy days does Yosemite have in September?
Yosemite averages approximately 5 rainy days in September, with a total monthly rainfall of about 22mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04What should I pack for Yosemite in September?
What should I pack for Yosemite in September?
For Yosemite in September, pack a warm winter coat, layered clothing for changing temperatures, a merino base layer for evenings, comfortable walking shoes. These recommendations are based on the ten-year weather averages for this specific month.
Q05How crowded is Yosemite in September?
How crowded is Yosemite in September?
Tourist crowds in Yosemite during September are typically moderate — shoulder season, a sweet spot between crowds and weather. Consider this when planning accommodation — prices track crowd levels closely.