When to go · San José
San José in September
Mixed month. Very wet; landslides on rural roads.
Key facts
- Verdict
- Mixed
- Temperature
- 26°C (79°F)79°F (26°C) / 18°C (64°F)64°F (18°C)
- average high / low
- Rain days
- 23
- Crowds
- Low
- Costa Rica overall
- Prices
- Low
- Costa Rica overall
Verdict
Very wet; landslides on rural roads.
All twelve months in one grid — weather, crowds and prices, with gaps left as unknown.
Is another month better than September?
September is rated mixed. These months rate higher:
Weather in September
- San JoséHighs around 26 °C (79 °F), lows around 18 °C (64 °F), rain on about 23 daysHighs around 79 °F (26 °C), lows around 64 °F (18 °C), rain on about 23 days
- Central Valley and mountains, Costa Rica · San José, Monteverde, Poás, Irazúrainy
Spring-like 18–26 °C (64–79 °F); Monteverde is cool, windy and misty — pack a fleece.Spring-like 64–79 °F (18–26 °C); Monteverde is cool, windy and misty — pack a fleece.
Peak wet season season
Lowest prices and quiet museums.
Watch: September and October are the wettest; landslides close some rural roads.
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Independence Day and lantern parade
14–15 September · Nationwide, downtown parades
Museums closed on the day; parades block downtown streets.
Crowds and prices
- Crowds · Costa Rica overall
- Low
- Prices · Costa Rica overall
- Low
Costa Rica overall: Wettest on the Pacific; driest on the Caribbean — switch sides.
Compare two months
Weather, crowds and prices for any two months in San José, side by side.
Verdict
Sep: Mixed
Jan: Great (better)
Daytime high
Sep: 26 °C (79 °F)79 °F (26 °C)
Jan: 26 °C (79 °F)79 °F (26 °C)
Night low
Sep: 18 °C (64 °F)64 °F (18 °C)
Jan: 16 °C (61 °F)61 °F (16 °C)
Rain days
Sep: 23
Jan: 3 (better)
Crowds
Sep: Low
Jan: High
Prices
Sep: Low
Jan: High
Festivals listed
Sep: 1
Jan: 2
September: Very wet; landslides on rural roads.
January: Dry and sunny; mornings cool.
San José: figures are long-term averages from this guide, not a forecast.
What to pack
- A rain jacket or umbrella and shoes that dry fast