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Niagara-on-the-Lake vs Castries

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Comparing Niagara-on-the-Lake change · Castries change

Bottom line

Castries is the warmer of the two — about 17°C on the annual average; Castries is the wetter, with 1281 mm more rain a year, and Castries the sunnier.

Warmer Castries 17°C on the year
Wetter Castries 1281 mm more a year
Sunnier Castries 24 pp less cloud
Colder winters Niagara-on-the-Lake 31°C colder nights

How the seasons compare

The differences between Niagara-on-the-Lake and Castries, in everyday terms.

Summers

Castries has hotter summers

Niagara-on-the-Lake: Warm
Castries: Warm

Winters

Castries has far milder winters

Niagara-on-the-Lake: Cold
Castries: Stays warm

Rain & snow

Castries is much wetter

Niagara-on-the-Lake: Moderate rainfall
Castries: Very wet

Sky

Castries is far sunnier

Niagara-on-the-Lake: Often cloudy
Castries: Fairly sunny

Month-by-month charts

Temperature

Castries is the warmer of the two — about 17°C on the annual average.

-20°0°20°40° JanAprJulOct Niagara-on-the-LakeCastries

Precipitation

Castries is the wetter — about 1281 mm more across the year.

PRECIPITATION (mm) 0150300 JanAprJulOct Niagara-on-the-LakeCastries

Clear skies

Castries has the clearer skies — the higher line.

0%25%50%75%100% JanAprJulOct Niagara-on-the-LakeCastries

Exact monthly numbers

Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.

Avg high (°C) Castries runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Niagara-on-the-Lake0151017222626221593
Castries272727282828282929292827
Difference+26+26+22+17+12+6+2+3+7+13+19+24
Jan – JunJanFebMarAprMayJun
Niagara-on-the-Lake015101722
Castries272727282828
Difference+26+26+22+17+12+6
Jul – DecJulAugSepOctNovDec
Niagara-on-the-Lake2626221593
Castries282929292827
Difference+2+3+7+13+19+24
Avg low (°C) Castries runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Niagara-on-the-Lake-5-5-2391519191593-2
Castries262525262727272828282726
Difference+31+30+27+23+18+12+9+9+13+19+24+28
Jan – JunJanFebMarAprMayJun
Niagara-on-the-Lake-5-5-23915
Castries262525262727
Difference+31+30+27+23+18+12
Jul – DecJulAugSepOctNovDec
Niagara-on-the-Lake19191593-2
Castries272828282726
Difference+9+9+13+19+24+28
Precipitation (mm) Castries runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Niagara-on-the-Lake473643746678625365615244
Castries113766690114134216291224246243149
Difference+67+40+23+16+48+56+154+238+159+185+191+105
Jan – JunJanFebMarAprMayJun
Niagara-on-the-Lake473643746678
Castries113766690114134
Difference+67+40+23+16+48+56
Jul – DecJulAugSepOctNovDec
Niagara-on-the-Lake625365615244
Castries216291224246243149
Difference+154+238+159+185+191+105
Cloud cover (%) Niagara-on-the-Lake runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Niagara-on-the-Lake787473737267636262727577
Castries383942495259504651514641
Difference-39-36-31-24-20-8-13-15-11-21-29-37
Jan – JunJanFebMarAprMayJun
Niagara-on-the-Lake787473737267
Castries383942495259
Difference-39-36-31-24-20-8
Jul – DecJulAugSepOctNovDec
Niagara-on-the-Lake636262727577
Castries504651514641
Difference-13-15-11-21-29-37
Relative humidity (%) Varies through the year
JanFebMarAprMayJunJulAugSepOctNovDec
Niagara-on-the-Lake868480787775737374788184
Castries767575767779797979797977
Difference-10-9-5-2—+3+6+6+4+1-2-7
Jan – JunJanFebMarAprMayJun
Niagara-on-the-Lake868480787775
Castries767575767779
Difference-10-9-5-2—+3
Jul – DecJulAugSepOctNovDec
Niagara-on-the-Lake737374788184
Castries797979797977
Difference+6+6+4+1-2-7

How both climates are changing

Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Niagara-on-the-Lake trends → · Castries trends →

Methodology & sources

Niagara-on-the-Lake

Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Port Weller (aut), a weather station, about 11 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

Castries

Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.

Precipitation — 1991–2020 normals computed from 10 years of daily observations at LE Lamentin, a weather station, about 66 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →

← change Niagara-on-the-Lake · change Castries → · Niagara-on-the-Lake page · Castries page