When to go · Grand Coulee
Grand Coulee, month by month
The best months for Grand Coulee: Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Dec–Feb (cold, limited services).5 °C (41 °F) / -5 °C (23 °F), 6 rain days41 °F (5 °C) / 23 °F (-5 °C), 6 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Dec–Feb (cold, limited services).7 °C (45 °F) / -3 °C (27 °F), 5 rain days45 °F (7 °C) / 27 °F (-3 °C), 5 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (Jun–Sep). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.12 °C (54 °F) / 1 °C (34 °F), 6 rain days54 °F (12 °C) / 34 °F (1 °C), 6 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (Jun–Sep). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.17 °C (63 °F) / 5 °C (41 °F), 5 rain days63 °F (17 °C) / 41 °F (5 °C), 5 rain daysCrowds: Medium · 1 festival or holiday
- MayGoodOutside the best window (Jun–Sep). Across United States: Warm and green; Memorial Day (last Monday) opens the summer season; timed-entry systems start at some parks.22 °C (72 °F) / 9 °C (48 °F), 4 rain days72 °F (22 °C) / 48 °F (9 °C), 4 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Grand Coulee's best window: Jun–Sep.27 °C (81 °F) / 13 °C (55 °F), 3 rain days81 °F (27 °C) / 55 °F (13 °C), 3 rain daysCrowds: High
- JulyGreatInside Grand Coulee's best window: Jun–Sep.31 °C (88 °F) / 16 °C (61 °F), 2 rain days88 °F (31 °C) / 61 °F (16 °C), 2 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Grand Coulee's best window: Jun–Sep.30 °C (86 °F) / 15 °C (59 °F), 3 rain days86 °F (30 °C) / 59 °F (15 °C), 3 rain daysCrowds: High
- SeptemberGreatInside Grand Coulee's best window: Jun–Sep.26 °C (79 °F) / 11 °C (52 °F), 4 rain days79 °F (26 °C) / 52 °F (11 °C), 4 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGoodOutside the best window (Jun–Sep). Across United States: Best all-round month: New England foliage, desert parks, cooler cities. High roads start closing late in the month.19 °C (66 °F) / 5 °C (41 °F), 5 rain days66 °F (19 °C) / 41 °F (5 °C), 5 rain daysCrowds: Medium
- NovemberMixedOutside the best window (Jun–Sep). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.11 °C (52 °F) / -1 °C (30 °F), 6 rain days52 °F (11 °C) / 30 °F (-1 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Dec–Feb (cold, limited services).6 °C (43 °F) / -4 °C (25 °F), 7 rain days43 °F (6 °C) / 25 °F (-4 °C), 7 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Grand Coulee, side by side.
Verdict
Jun: Great
Jul: Great
Daytime high
Jun: 27 °C (81 °F)81 °F (27 °C)
Jul: 31 °C (88 °F)88 °F (31 °C)
Night low
Jun: 13 °C (55 °F)55 °F (13 °C)
Jul: 16 °C (61 °F)61 °F (16 °C)
Rain days
Jun: 3
Jul: 2 (better)
Crowds
Jun: High
Jul: High
Prices
Jun: High
Jul: High
Festivals listed
Jun: 0
Jul: 1
June: Inside Grand Coulee's best window: Jun–Sep.
July: Inside Grand Coulee's best window: Jun–Sep.
Grand Coulee: figures are long-term averages from this guide, not a forecast.