5-day weather forecast Niagara 17-05-2026

Weather forecast Niagara today 17.05.2026: sunny, temperature from 7 °C to 16 °C.

Precipitation probability 100%. Wind up to 4.11 m/s (gusts 5.72 m/s). Air humidity 46–99%, atmospheric pressure 758–764 mm Hg, UV index up to 5.1.

Sunrise 05:18
Sunset 20:19

Waxing Crescent0% illuminated
Moonrise 05:20 · Moonset 22:13

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Table

Sun, May 17, 2026

Mon, May 18 →

Forecast from 7 °C to 16 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	12	10	9	8	7	7	7	7	9	11	13	15	16	15	14	12	10	9	9	9	9	9	9	9
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0.1	0.36	1.45	0.85	0.02	0.09	1.06	0.07	0.63	0.38	0.25

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	0	0	0	0	0	1	1	0	1	0	0	1	3	89	82	85	98	100	100	100	100	100	100	100
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	100	100	100	100	86	100	100	100	100	100	100

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	1.61	2	2	1.81	1.81	1.5	1.5	2.81	2.61	3.5	2.5	3.39	3.5	4.11	3.39	3.19	3.31	3.11	2.5	2.89	3	3.69	3.89	3.89
Wind gust (m/s)	3.17	3.94	3.86	3.39	3.42	2.97	2.67	3.53	3	4.03	2.89	3.92	4.03	4.72	4.39	4.64	3.94	4.53	3.64	4.11	4.47	5.5	5.61	5.72
Wind direction (°)	N 4°	N 8°	N 3°	NNE 29°	NE 43°	NE 52°	NE 54°	NE 51°	ENE 69°	ENE 66°	E 89°	ESE 107°	ESE 107°	ESE 122°	SE 127°	SE 128°	ESE 102°	E 83°	E 89°	E 96°	E 94°	ESE 103°	ESE 105°	ESE 109°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	56	55	53	59	65	71	73	67	68	59	54	48	46	46	66	82	87	81	86	96	98	99	98	99

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	762	763	764	764	764	764	764	762	764	764	764	763	762	762	762	762	762	761	761	761	761	760	759	758

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0.1	0.5	1.1	2.1	3.3	4.6	5.1	3.5	1.6	0.9	2.9	0.8	0.2	0.1	0	0	0	0

Air quality & pollen

Air quality
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
PM2.5 (µg/m³)	1.2	1.2	1.1	1.1	1.2	1.2	1.2	1.3	1.3	1.4	1.6	2	2.2	2.8	3.3	4.5	4.1	3.9	4.5	5.4	7.1	9.3	10.2	10
PM10 (µg/m³)	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.3	1.4	1.5	1.9	2.3	2.6	3.3	3.9	5.3	4.6	4.3	4.8	5.7	7.3	9.5	10.5	10.3
Ozone (O₃) (µg/m³)	53	52	52	54	56	59	62	65	67	69	71	72	71	69	67	64	60	59	62	68	74	79	84	86
NO₂ (µg/m³)	2.4	2.1	1.9	1.7	1.5	1.3	1.2	1.2	1.2	1.2	1.2	1.3	1.4	1.6	1.8	2.2	2.6	2.9	2.9	2.7	2.7	3	3.5	3.8
SO₂ (µg/m³)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1.1	1.1	1.1	1.2	1.3	1.5	1.8	2
CO (µg/m³)	120.9	120.9	119.9	119.9	119.9	120.9	121.9	122.9	123.9	123.9	124.9	124.9	125.9	127.9	128.9	129.9	130.9	132.9	135.9	140.9	144.9	149.9	154.9	157.9

Sun, May 17, 2026

Mon, May 18 →

Frequently asked questions about the weather in Niagara

Today in Niagara the temperature ranges from 7 °C to 16 °C, wind up to 4.11 m/s. Check the detailed hourly forecast above for more information.

The precipitation probability in Niagara today is 100%. View the full multi-day forecast above to see the rain chances for each upcoming day.

The wind speed in Niagara today reaches up to 4.11 m/s with gusts up to 5.72 m/s. Check the detailed wind chart above for hourly wind data.

The air humidity in Niagara today ranges from 46% to 99%. View the humidity chart above for hourly details.

The UV index in Niagara today reaches up to 5.1. Check the UV index chart above for hourly values throughout the day.

The atmospheric pressure in Niagara today ranges from 758 to 764 mm Hg. View the pressure chart above for hourly readings.

Cloud cover in Niagara today reaches up to 100%. Check the cloud cover chart above for hourly details throughout the day.

Niagara on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

Learn more about our methodology →