When to go · Mercer Island
Mercer Island, month by month
The best months for Mercer Island: Apr, May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb, Mar, Nov, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Nov–Mar (rainy, cooler).8 °C (46 °F) / 2 °C (36 °F), 12 rain days46 °F (8 °C) / 36 °F (2 °C), 12 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Mar (rainy, cooler).9 °C (48 °F) / 2 °C (36 °F), 10 rain days48 °F (9 °C) / 36 °F (2 °C), 10 rain daysCrowds: Low · 1 festival or holiday
- MarchAvoidListed as a month to avoid: Nov–Mar (rainy, cooler).12 °C (54 °F) / 4 °C (39 °F), 9 rain days54 °F (12 °C) / 39 °F (4 °C), 9 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside Mercer Island's best window: Apr–Oct.15 °C (59 °F) / 6 °C (43 °F), 7 rain days59 °F (15 °C) / 43 °F (6 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Mercer Island's best window: Apr–Oct.18 °C (64 °F) / 9 °C (48 °F), 6 rain days64 °F (18 °C) / 48 °F (9 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Mercer Island's best window: Apr–Oct.22 °C (72 °F) / 12 °C (54 °F), 5 rain days72 °F (22 °C) / 54 °F (12 °C), 5 rain daysCrowds: High
- JulyGreatInside Mercer Island's best window: Apr–Oct.25 °C (77 °F) / 14 °C (57 °F), 4 rain days77 °F (25 °C) / 57 °F (14 °C), 4 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Mercer Island's best window: Apr–Oct.25 °C (77 °F) / 14 °C (57 °F), 5 rain days77 °F (25 °C) / 57 °F (14 °C), 5 rain daysCrowds: High
- SeptemberGreatInside Mercer Island's best window: Apr–Oct.22 °C (72 °F) / 11 °C (52 °F), 6 rain days72 °F (22 °C) / 52 °F (11 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Mercer Island's best window: Apr–Oct.17 °C (63 °F) / 8 °C (46 °F), 8 rain days63 °F (17 °C) / 46 °F (8 °C), 8 rain daysCrowds: Medium
- NovemberAvoidListed as a month to avoid: Nov–Mar (rainy, cooler).11 °C (52 °F) / 4 °C (39 °F), 10 rain days52 °F (11 °C) / 39 °F (4 °C), 10 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Nov–Mar (rainy, cooler).8 °C (46 °F) / 2 °C (36 °F), 12 rain days46 °F (8 °C) / 36 °F (2 °C), 12 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Mercer Island, side by side.
Verdict
Apr: Great
May: Great
Daytime high
Apr: 15 °C (59 °F)59 °F (15 °C)
May: 18 °C (64 °F)64 °F (18 °C)
Night low
Apr: 6 °C (43 °F)43 °F (6 °C)
May: 9 °C (48 °F)48 °F (9 °C)
Rain days
Apr: 7
May: 6 (better)
Crowds
Apr: Medium
May: Medium
Prices
Apr: Medium
May: Medium
Festivals listed
Apr: 1
May: 1
April: Inside Mercer Island's best window: Apr–Oct.
May: Inside Mercer Island's best window: Apr–Oct.
Mercer Island: figures are long-term averages from this guide, not a forecast.