When to go · Portsmouth
Portsmouth, month by month
The best months for Portsmouth: May, Jun, Sep, Oct. Months to avoid: Jan, Feb, Jul, Aug.
Month by month
- JanuaryAvoidListed as a month to avoid: Jul–Aug (heat and humidity), Jan–Feb (ice on the river roads).5 °C (41 °F) / -5 °C (23 °F), 11 rain days41 °F (5 °C) / 23 °F (-5 °C), 11 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Jul–Aug (heat and humidity), Jan–Feb (ice on the river roads).7 °C (45 °F) / -4 °C (25 °F), 10 rain days45 °F (7 °C) / 25 °F (-4 °C), 10 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (May–Jun, Sep–Oct). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.13 °C (55 °F) / 0 °C (32 °F), 12 rain days55 °F (13 °C) / 32 °F (0 °C), 12 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (May–Jun, Sep–Oct). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.19 °C (66 °F) / 5 °C (41 °F), 12 rain days66 °F (19 °C) / 41 °F (5 °C), 12 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Portsmouth's best window: May–Jun, Sep–Oct.24 °C (75 °F) / 11 °C (52 °F), 12 rain days75 °F (24 °C) / 52 °F (11 °C), 12 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Portsmouth's best window: May–Jun, Sep–Oct.28 °C (82 °F) / 16 °C (61 °F), 11 rain days82 °F (28 °C) / 61 °F (16 °C), 11 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Aug (heat and humidity), Jan–Feb (ice on the river roads).30 °C (86 °F) / 18 °C (64 °F), 11 rain days86 °F (30 °C) / 64 °F (18 °C), 11 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Jul–Aug (heat and humidity), Jan–Feb (ice on the river roads).30 °C (86 °F) / 17 °C (63 °F), 9 rain days86 °F (30 °C) / 63 °F (17 °C), 9 rain daysCrowds: High
- SeptemberGreatInside Portsmouth's best window: May–Jun, Sep–Oct.26 °C (79 °F) / 13 °C (55 °F), 8 rain days79 °F (26 °C) / 55 °F (13 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Portsmouth's best window: May–Jun, Sep–Oct.20 °C (68 °F) / 7 °C (45 °F), 9 rain days68 °F (20 °C) / 45 °F (7 °C), 9 rain daysCrowds: Medium
- NovemberMixedOutside the best window (May–Jun, Sep–Oct). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.13 °C (55 °F) / 2 °C (36 °F), 10 rain days55 °F (13 °C) / 36 °F (2 °C), 10 rain daysCrowds: Medium · 1 festival or holiday
- DecemberMixedOutside the best window (May–Jun, Sep–Oct). Across United States: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.7 °C (45 °F) / -3 °C (27 °F), 11 rain days45 °F (7 °C) / 27 °F (-3 °C), 11 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Portsmouth, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 24 °C (75 °F)75 °F (24 °C)
Jun: 28 °C (82 °F)82 °F (28 °C)
Night low
May: 11 °C (52 °F)52 °F (11 °C)
Jun: 16 °C (61 °F)61 °F (16 °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 Portsmouth's best window: May–Jun, Sep–Oct.
June: Inside Portsmouth's best window: May–Jun, Sep–Oct.
Portsmouth: figures are long-term averages from this guide, not a forecast.