Portsmouth
United States · 18K
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: 15% viability
15May: 49% viability
49Jun: 82% viability
82Jul: 79% viability
79Aug: 83% viability
83Sep: 64% viability
64Oct: 34% viability
34Nov: 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
6.1µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
6.86.8 µg/m³ — Good
6.06.0 µg/m³ — Good
6.46.4 µg/m³ — Good
5.65.6 µg/m³ — Good
5.15.1 µg/m³ — Good
6.16.1 µg/m³ — Good
8.38.3 µg/m³ — Good
6.56.5 µg/m³ — Good
6.06.0 µg/m³ — Good
5.65.6 µg/m³ — Good
5.55.5 µg/m³ — Good
5.15.1 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
6.86.8 µg/m³ — Good
6.06.0 µg/m³ — Good
6.46.4 µg/m³ — Good
5.65.6 µg/m³ — Good
5.15.1 µg/m³ — Good
6.16.1 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
8.38.3 µg/m³ — Good
6.56.5 µg/m³ — Good
6.06.0 µg/m³ — Good
5.65.6 µg/m³ — Good
5.55.5 µg/m³ — Good
5.15.1 µg/m³ — Good
Best months: May, Nov–DecWorst months: Jan, Jul–Aug
Good5–10 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
2,332hrs/yr
Clear sky
46%
Worst month
4.0hrs/day
Vit D months
6.4months
UV 8+ days
15days/yr
UV 11+ days
0days/yr
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Daily hrs
6.36.3 hrs — Good
7.87.8 hrs — Good
8.78.7 hrs — Sunny
1010 hrs — Very Sunny
1010 hrs — Very Sunny
1212 hrs — Very Sunny
1212 hrs — Very Sunny
1010 hrs — Very Sunny
9.09.0 hrs — Sunny
7.97.9 hrs — Good
7.97.9 hrs — Good
6.76.7 hrs — Good
Jan
Feb
Mar
Apr
May
Jun
6.36.3 hrs — Good
7.87.8 hrs — Good
8.78.7 hrs — Sunny
1010 hrs — Very Sunny
1010 hrs — Very Sunny
1212 hrs — Very Sunny
Jul
Aug
Sep
Oct
Nov
Dec
1212 hrs — Very Sunny
1010 hrs — Very Sunny
9.09.0 hrs — Sunny
7.97.9 hrs — Good
7.97.9 hrs — Good
6.76.7 hrs — Good
Best months: Jun–AugWorst months: Jan–Feb, Dec
GoodSunnyVery Sunny
Based on ERA5 sunshine data · CAMS UV indexConfidence: ●●●