Riihimäki
Finland · 26K
Lifestyle Calendar
When this city supports your activity — and when it fights you.
Riihimäki
Finland
Dinner Outside6 – 10 pm
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Verdict
Jan: 0% viability
0Feb: 0% viability
0Mar: 0% viability
0Apr: 14% viability
14May: 48% viability
48Jun: 85% viability
85Jul: 79% viability
79Aug: 78% viability
78Sep: 39% viability
39Oct: 2% viability
2Nov: 0% viability
0Dec: 0% viability
0Cold
Friction Breakdown
Heat
Cold
Wind
Rain
Humid
Air Q.
Best months: Jun–AugChallenging: Jan–Apr, Sep–Dec
ComfortableModerateUncomfortable
Based on 2014–2024 hourly climate data · Updated Mar 2025Confidence: ●●●
Air Quality Profile
Annual and monthly PM2.5 levels against WHO guidelines.
Riihimäki
Finland
Annual Average
GoodWHO annual classification
5.7µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
5.75.7 µg/m³ — Good
5.85.8 µg/m³ — Good
6.16.1 µg/m³ — Good
5.25.2 µg/m³ — Good
5.95.9 µg/m³ — Good
5.75.7 µg/m³ — Good
5.95.9 µg/m³ — Good
6.16.1 µg/m³ — Good
5.65.6 µg/m³ — Good
5.05.0 µg/m³ — Excellent
4.44.4 µg/m³ — Excellent
6.36.3 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
5.75.7 µg/m³ — Good
5.85.8 µg/m³ — Good
6.16.1 µg/m³ — Good
5.25.2 µg/m³ — Good
5.95.9 µg/m³ — Good
5.75.7 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
5.95.9 µg/m³ — Good
6.16.1 µg/m³ — Good
5.65.6 µg/m³ — Good
5.05.0 µg/m³ — Excellent
4.44.4 µg/m³ — Excellent
6.36.3 µg/m³ — Good
Best months: Apr, Oct–NovWorst months: Mar, Aug, Dec
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.
Riihimäki
Finland
Annual Summary
Sunshine
1,638hrs/yr
Clear sky
34%
Worst month
0.0hrs/day
Vit D months
2.7months
UV 8+ days
0days/yr
UV 11+ days
0days/yr
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Daily hrs
0.00.0 hrs — No Sun
2.02.0 hrs — Dark
6.36.3 hrs — Good
1111 hrs — Very Sunny
1212 hrs — Very Sunny
1414 hrs — Very Sunny
1212 hrs — Very Sunny
1010 hrs — Sunny
5.85.8 hrs — Moderate
3.33.3 hrs — Low
0.00.0 hrs — No Sun
0.00.0 hrs — No Sun
Jan
Feb
Mar
Apr
May
Jun
0.00.0 hrs — No Sun
2.02.0 hrs — Dark
6.36.3 hrs — Good
1111 hrs — Very Sunny
1212 hrs — Very Sunny
1414 hrs — Very Sunny
Jul
Aug
Sep
Oct
Nov
Dec
1212 hrs — Very Sunny
1010 hrs — Sunny
5.85.8 hrs — Moderate
3.33.3 hrs — Low
0.00.0 hrs — No Sun
0.00.0 hrs — No Sun
Best months: May–JulWorst months: Jan, Nov–Dec
No SunDarkLowModerateGoodSunnyVery Sunny
Based on ERA5 sunshine data · CAMS UV indexConfidence: ●●●