Portsmouth
United States · 22K
Lifestyle Calendar
When this city supports your activity — and when it fights you.
Portsmouth
United States
Dinner Outside6 – 10 pm
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Verdict
Jan: 0% viability
0Feb: 0% viability
0Mar: 3% viability
3Apr: 18% viability
18May: 59% viability
59Jun: 83% viability
83Jul: 84% viability
84Aug: 87% viability
87Sep: 68% viability
68Oct: 31% viability
31Nov: 2% viability
2Dec: 0% viability
0Cold
Friction Breakdown
Heat
Cold
Wind
Rain
Humid
Air Q.
Best months: Jun–AugChallenging: Jan–Apr, Oct–Dec
ComfortableModerateUncomfortable
Based on 2014–2024 hourly climate data · Updated Mar 2025Confidence: ●●●
Air Quality Profile
Annual and monthly PM2.5 levels against WHO guidelines.
Portsmouth
United States
Annual Average
GoodWHO annual classification
5.7µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
5.85.8 µg/m³ — Good
5.55.5 µg/m³ — Good
5.75.7 µg/m³ — Good
4.64.6 µg/m³ — Excellent
5.65.6 µg/m³ — Good
6.76.7 µg/m³ — Good
6.76.7 µg/m³ — Good
6.76.7 µg/m³ — Good
5.05.0 µg/m³ — Excellent
5.45.4 µg/m³ — Good
5.15.1 µg/m³ — Good
5.35.3 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
5.85.8 µg/m³ — Good
5.55.5 µg/m³ — Good
5.75.7 µg/m³ — Good
4.64.6 µg/m³ — Excellent
5.65.6 µg/m³ — Good
6.76.7 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
6.76.7 µg/m³ — Good
6.76.7 µg/m³ — Good
5.05.0 µg/m³ — Excellent
5.45.4 µg/m³ — Good
5.15.1 µg/m³ — Good
5.35.3 µg/m³ — Good
Best months: Apr, Sep, NovWorst months: Jun–Aug
Excellent0–5 µg/m³Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholdsConfidence: ●●●
Sun & UV Profile
Monthly sunshine, sky clarity, and UV exposure patterns.
Portsmouth
United States
Annual Summary
Sunshine
2,352hrs/yr
Clear sky
45%
Worst month
3.8hrs/day
Vit D months
6.2months
UV 8+ days
6days/yr
UV 11+ days
0days/yr
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Daily hrs
6.66.6 hrs — Good
7.37.3 hrs — Good
9.09.0 hrs — Sunny
9.89.8 hrs — Sunny
1111 hrs — Very Sunny
1212 hrs — Very Sunny
1111 hrs — Very Sunny
1111 hrs — Very Sunny
9.49.4 hrs — Sunny
8.28.2 hrs — Sunny
7.67.6 hrs — Good
5.65.6 hrs — Moderate
Jan
Feb
Mar
Apr
May
Jun
6.66.6 hrs — Good
7.37.3 hrs — Good
9.09.0 hrs — Sunny
9.89.8 hrs — Sunny
1111 hrs — Very Sunny
1212 hrs — Very Sunny
Jul
Aug
Sep
Oct
Nov
Dec
1111 hrs — Very Sunny
1111 hrs — Very Sunny
9.49.4 hrs — Sunny
8.28.2 hrs — Sunny
7.67.6 hrs — Good
5.65.6 hrs — Moderate
Best months: May–JulWorst months: Jan–Feb, Dec
ModerateGoodSunnyVery Sunny
Based on ERA5 sunshine data · CAMS UV indexConfidence: ●●●