When to go · Portsmouth, New Hampshire
Portsmouth, New Hampshire, month by month
The best months for Portsmouth, New Hampshire: May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb.
Month by month
- JanuaryAvoidListed as a month to avoid: Jan–Feb (cold, some sights closed).1 °C (34 °F) / -9 °C (16 °F), 10 rain days34 °F (1 °C) / 16 °F (-9 °C), 10 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Jan–Feb (cold, some sights closed).2 °C (36 °F) / -8 °C (18 °F), 9 rain days36 °F (2 °C) / 18 °F (-8 °C), 9 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (May–Oct). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.7 °C (45 °F) / -3 °C (27 °F), 10 rain days45 °F (7 °C) / 27 °F (-3 °C), 10 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (May–Oct). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.13 °C (55 °F) / 2 °C (36 °F), 11 rain days55 °F (13 °C) / 36 °F (2 °C), 11 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Portsmouth, New Hampshire's best window: May–Oct.19 °C (66 °F) / 8 °C (46 °F), 12 rain days66 °F (19 °C) / 46 °F (8 °C), 12 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Portsmouth, New Hampshire's best window: May–Oct.24 °C (75 °F) / 13 °C (55 °F), 11 rain days75 °F (24 °C) / 55 °F (13 °C), 11 rain daysCrowds: High
- JulyGreatInside Portsmouth, New Hampshire's best window: May–Oct.27 °C (81 °F) / 16 °C (61 °F), 10 rain days81 °F (27 °C) / 61 °F (16 °C), 10 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Portsmouth, New Hampshire's best window: May–Oct.26 °C (79 °F) / 16 °C (61 °F), 9 rain days79 °F (26 °C) / 61 °F (16 °C), 9 rain daysCrowds: High
- SeptemberGreatInside Portsmouth, New Hampshire's best window: May–Oct.22 °C (72 °F) / 12 °C (54 °F), 9 rain days72 °F (22 °C) / 54 °F (12 °C), 9 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Portsmouth, New Hampshire's best window: May–Oct.16 °C (61 °F) / 6 °C (43 °F), 10 rain days61 °F (16 °C) / 43 °F (6 °C), 10 rain daysCrowds: Medium
- NovemberMixedOutside the best window (May–Oct). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.10 °C (50 °F) / 1 °C (34 °F), 10 rain days50 °F (10 °C) / 34 °F (1 °C), 10 rain daysCrowds: Medium · 1 festival or holiday
- DecemberMixedOutside the best window (May–Oct). Across United States: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.4 °C (39 °F) / -6 °C (21 °F), 11 rain days39 °F (4 °C) / 21 °F (-6 °C), 11 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Portsmouth, New Hampshire, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 19 °C (66 °F)66 °F (19 °C)
Jun: 24 °C (75 °F)75 °F (24 °C)
Night low
May: 8 °C (46 °F)46 °F (8 °C)
Jun: 13 °C (55 °F)55 °F (13 °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, New Hampshire's best window: May–Oct.
June: Inside Portsmouth, New Hampshire's best window: May–Oct.
Portsmouth, New Hampshire: figures are long-term averages from this guide, not a forecast.