Chilaw
Sri Lanka · 25K
Lifestyle Calendar
When this city supports your activity — and when it fights you.
ChilawSri Lanka
Sri LankaDinner Outside6 – 10 pm
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Verdict
Jan: 83% viability
83Feb: 88% viability
88Mar: 88% viability
88Apr: 61% viability
61May: 41% viability
41Jun: 61% viability
61Jul: 67% viability
67Aug: 72% viability
72Sep: 60% viability
60Oct: 56% viability
56Nov: 46% viability
46Dec: 78% viability
78Humid
Friction Breakdown
Heat
Cold
Wind
Rain
Humid
Air Q.
Best months: Jan–Mar, Aug, DecChallenging: None
ComfortableModerateUncomfortable
Based on 2014–2024 hourly climate data · Updated Mar 2025Confidence: ●●●
Air Quality Profile
Annual and monthly PM2.5 levels against WHO guidelines.
ChilawSri Lanka
Sri LankaAnnual Average
ModerateWHO annual classification
17.4µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2121 µg/m³ — Moderate
2222 µg/m³ — Moderate
2929 µg/m³ — Poor
2424 µg/m³ — Moderate
1212 µg/m³ — Fair
1313 µg/m³ — Fair
1313 µg/m³ — Fair
1414 µg/m³ — Fair
1212 µg/m³ — Fair
1313 µg/m³ — Fair
1818 µg/m³ — Moderate
1818 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
2121 µg/m³ — Moderate
2222 µg/m³ — Moderate
2929 µg/m³ — Poor
2424 µg/m³ — Moderate
1212 µg/m³ — Fair
1313 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1313 µg/m³ — Fair
1414 µg/m³ — Fair
1212 µg/m³ — Fair
1313 µg/m³ — Fair
1818 µg/m³ — Moderate
1818 µg/m³ — Moderate
Best months: May–Jun, SepWorst months: Feb–Apr
Fair10–15 µg/m³Moderate15–25 µg/m³Poor25–35 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholdsConfidence: ●●●
Sun & UV Profile
Monthly sunshine, sky clarity, and UV exposure patterns.
ChilawSri Lanka
Sri LankaAnnual Summary
Sunshine
2,498hrs/yr
Clear sky
40%
Worst month
5.0hrs/day
Vit D months
11.5months
UV 8+ days
276days/yr
UV 11+ days
59days/yr
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Daily hrs
9.49.4 hrs — Sunny
1010 hrs — Very Sunny
9.99.9 hrs — Sunny
9.89.8 hrs — Sunny
9.79.7 hrs — Sunny
9.79.7 hrs — Sunny
9.49.4 hrs — Sunny
9.79.7 hrs — Sunny
8.68.6 hrs — Sunny
8.38.3 hrs — Sunny
8.18.1 hrs — Sunny
9.39.3 hrs — Sunny
Jan
Feb
Mar
Apr
May
Jun
9.49.4 hrs — Sunny
1010 hrs — Very Sunny
9.99.9 hrs — Sunny
9.89.8 hrs — Sunny
9.79.7 hrs — Sunny
9.79.7 hrs — Sunny
Jul
Aug
Sep
Oct
Nov
Dec
9.49.4 hrs — Sunny
9.79.7 hrs — Sunny
8.68.6 hrs — Sunny
8.38.3 hrs — Sunny
8.18.1 hrs — Sunny
9.39.3 hrs — Sunny
Best months: Feb–AprWorst months: Sep–Nov
SunnyVery Sunny
Based on ERA5 sunshine data · CAMS UV indexConfidence: ●●●