Portsmouth
United States · 20K
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: 4% viability
4Mar: 29% viability
29Apr: 51% viability
51May: 71% viability
71Jun: 83% viability
83Jul: 78% viability
78Aug: 77% viability
77Sep: 87% viability
87Oct: 58% viability
58Nov: 14% viability
14Dec: 2% viability
2Cold
Friction Breakdown
Heat
Cold
Wind
Rain
Humid
Air Q.
Best months: May–SepChallenging: Jan–Mar, Nov–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
7.4µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
7.37.3 µg/m³ — Good
7.67.6 µg/m³ — Good
6.36.3 µg/m³ — Good
6.56.5 µg/m³ — Good
8.38.3 µg/m³ — Good
7.47.4 µg/m³ — Good
7.87.8 µg/m³ — Good
7.97.9 µg/m³ — Good
7.27.2 µg/m³ — Good
7.07.0 µg/m³ — Good
8.58.5 µg/m³ — Good
7.27.2 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
7.37.3 µg/m³ — Good
7.67.6 µg/m³ — Good
6.36.3 µg/m³ — Good
6.56.5 µg/m³ — Good
8.38.3 µg/m³ — Good
7.47.4 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
7.87.8 µg/m³ — Good
7.97.9 µg/m³ — Good
7.27.2 µg/m³ — Good
7.07.0 µg/m³ — Good
8.58.5 µg/m³ — Good
7.27.2 µg/m³ — Good
Best months: Mar–Apr, OctWorst months: May, Aug, Nov
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
2,267hrs/yr
Clear sky
44%
Worst month
2.2hrs/day
Vit D months
7.4months
UV 8+ days
25days/yr
UV 11+ days
0days/yr
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Daily hrs
5.35.3 hrs — Moderate
8.18.1 hrs — Sunny
9.09.0 hrs — Sunny
1010 hrs — Sunny
9.89.8 hrs — Sunny
1111 hrs — Very Sunny
1111 hrs — Very Sunny
1111 hrs — Very Sunny
9.39.3 hrs — Sunny
8.08.0 hrs — Good
7.57.5 hrs — Good
5.05.0 hrs — Moderate
Jan
Feb
Mar
Apr
May
Jun
5.35.3 hrs — Moderate
8.18.1 hrs — Sunny
9.09.0 hrs — Sunny
1010 hrs — Sunny
9.89.8 hrs — Sunny
1111 hrs — Very Sunny
Jul
Aug
Sep
Oct
Nov
Dec
1111 hrs — Very Sunny
1111 hrs — Very Sunny
9.39.3 hrs — Sunny
8.08.0 hrs — Good
7.57.5 hrs — Good
5.05.0 hrs — Moderate
Best months: Jun–AugWorst months: Jan, Nov–Dec
ModerateGoodSunnyVery Sunny
Based on ERA5 sunshine data · CAMS UV indexConfidence: ●●●