When to go · San Luis
San Luis in September
Avoid month. Listed as a month to avoid: Jun–Sep (extreme heat, 40 °C (104 °F)+).Avoid month. Listed as a month to avoid: Jun–Sep (extreme heat, 104 °F (40 °C)+).
Key facts
- Verdict
- Avoid
- Temperature
- 40°C (104°F)104°F (40°C) / 23°C (73°F)73°F (23°C)
- average high / low
- Rain days
- 2
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Listed as a month to avoid: Jun–Sep (extreme heat, 40 °C (104 °F)+).Listed as a month to avoid: Jun–Sep (extreme heat, 104 °F (40 °C)+).
Is another month better than September?
September is rated avoid. These months rate higher:
Weather in September
- San LuisHighs around 40 °C (104 °F), lows around 23 °C (73 °F), rain on about 2 daysHighs around 104 °F (40 °C), lows around 73 °F (23 °C), rain on about 2 days
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.
Labor Day big impact
1st Monday of September · United States
End of summer; last big road-trip weekend.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.
Compare two months
Weather, crowds and prices for any two months in San Luis, side by side.
Verdict
Sep: Avoid
Jan: Great (better)
Daytime high
Sep: 40 °C (104 °F)104 °F (40 °C)
Jan: 21 °C (70 °F)70 °F (21 °C)
Night low
Sep: 23 °C (73 °F)73 °F (23 °C)
Jan: 6 °C (43 °F)43 °F (6 °C)
Rain days
Sep: 2 (better)
Jan: 3
Crowds
Sep: Medium
Jan: Low
Prices
Sep: Medium
Jan: Low
Festivals listed
Sep: 1
Jan: 0
September: Listed as a month to avoid: Jun–Sep (extreme heat, 40 °C+).
January: Inside San Luis's best window: Nov–Mar.
San Luis: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen