When to go · Grand Isle
Grand Isle, month by month
The best months for Grand Isle: May, Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Mar, Nov, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Nov–Mar (many facilities closed or limited).-2 °C (28 °F) / -12 °C (10 °F), 12 rain days28 °F (-2 °C) / 10 °F (-12 °C), 12 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Mar (many facilities closed or limited).0 °C (32 °F) / -10 °C (14 °F), 10 rain days32 °F (0 °C) / 14 °F (-10 °C), 10 rain daysCrowds: Low · 1 festival or holiday
- MarchAvoidListed as a month to avoid: Nov–Mar (many facilities closed or limited).6 °C (43 °F) / -5 °C (23 °F), 11 rain days43 °F (6 °C) / 23 °F (-5 °C), 11 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (May–Sep). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.14 °C (57 °F) / 2 °C (36 °F), 11 rain days57 °F (14 °C) / 36 °F (2 °C), 11 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Grand Isle's best window: May–Sep.21 °C (70 °F) / 8 °C (46 °F), 12 rain days70 °F (21 °C) / 46 °F (8 °C), 12 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Grand Isle's best window: May–Sep.26 °C (79 °F) / 14 °C (57 °F), 11 rain days79 °F (26 °C) / 57 °F (14 °C), 11 rain daysCrowds: High
- JulyGreatInside Grand Isle's best window: May–Sep.29 °C (84 °F) / 17 °C (63 °F), 10 rain days84 °F (29 °C) / 63 °F (17 °C), 10 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Grand Isle's best window: May–Sep.28 °C (82 °F) / 16 °C (61 °F), 10 rain days82 °F (28 °C) / 61 °F (16 °C), 10 rain daysCrowds: High
- SeptemberGreatInside Grand Isle's best window: May–Sep.23 °C (73 °F) / 11 °C (52 °F), 10 rain days73 °F (23 °C) / 52 °F (11 °C), 10 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGoodOutside the best window (May–Sep). Across United States: Best all-round month: New England foliage, desert parks, cooler cities. High roads start closing late in the month.16 °C (61 °F) / 5 °C (41 °F), 11 rain days61 °F (16 °C) / 41 °F (5 °C), 11 rain daysCrowds: Medium
- NovemberAvoidListed as a month to avoid: Nov–Mar (many facilities closed or limited).8 °C (46 °F) / -1 °C (30 °F), 12 rain days46 °F (8 °C) / 30 °F (-1 °C), 12 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Nov–Mar (many facilities closed or limited).1 °C (34 °F) / -8 °C (18 °F), 13 rain days34 °F (1 °C) / 18 °F (-8 °C), 13 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Grand Isle, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 21 °C (70 °F)70 °F (21 °C)
Jun: 26 °C (79 °F)79 °F (26 °C)
Night low
May: 8 °C (46 °F)46 °F (8 °C)
Jun: 14 °C (57 °F)57 °F (14 °C)
Rain days
May: 12
Jun: 11 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Grand Isle's best window: May–Sep.
June: Inside Grand Isle's best window: May–Sep.
Grand Isle: figures are long-term averages from this guide, not a forecast.