5-day weather forecast Niagara Falls 21-05-2026

Weather forecast Niagara Falls tomorrow 21.05.2026: sunny, temperature from 7 °C to 12 °C.

No precipitation expected. Wind up to 5.5 m/s (gusts 7.53 m/s). Air humidity 42–74%, atmospheric pressure 770–773 mm Hg, UV index up to 4.

Sunrise 05:47
Sunset 20:39

Waxing Crescent24% illuminated
Moonrise 10:36 · Moonset 01:09

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Table

← Wed, May 20

Thu, May 21, 2026

Fri, May 22 →

Forecast from 7 °C to 12 °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)	9	8	8	7	7	7	7	7	8	8	9	10	10	11	11	12	12	12	12	11	10	9	8	8
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

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 (%)	7	4	5	9	10	10	6	4	5	7	11	17	32	21	27	20	8	2	0	0	0	0	0	0
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

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)	2.69	2.69	2.89	3.19	3.5	4.31	4.81	5.11	5.5	5.5	5.19	5	4.89	4.61	4.39	4.19	4.31	4.19	3.89	3.39	2.69	2.5	2.11	2.31
Wind gust (m/s)	4.83	4.61	4.86	5.25	5.72	6.81	7.53	7.39	7.33	6.83	5.97	5.75	5.64	5.28	5.06	4.97	5.33	5.5	5.5	5.19	4.75	4.92	4.28	4.81
Wind direction (°)	NNW 348°	N 350°	N 356°	N 2°	NNE 18°	NE 36°	NE 50°	NE 51°	NE 54°	NE 54°	NE 49°	NE 46°	NE 43°	NE 46°	NE 42°	NE 45°	NE 46°	NE 51°	ENE 60°	ENE 70°	E 88°	E 97°	ESE 103°	ESE 104°

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 (%)	63	65	67	69	72	74	74	70	63	58	54	51	48	45	43	42	42	44	48	55	61	63	64	64

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)	770	770	770	770	770	771	771	772	773	773	773	773	773	773	772	772	771	771	771	771	771	771	771	771

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	0.2	0.8	3	3	3	4	4	4	4	4	4	4	4	4	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)	3.9	3.8	3.5	3	2.4	2.4	2.6	3	3.6	4.2	4.8	5.2	5.5	5.7	6.1	6.3	6.9	6.9	6.2	5.6	5.4	5.3	6.8	8.1
PM10 (µg/m³)	3.9	3.8	3.6	3	2.4	2.4	2.7	3.1	3.7	4.4	5	5.5	5.9	6.2	6.6	6.9	7.4	7.4	6.8	6.3	6.1	5.9	7.4	8.6
Ozone (O₃) (µg/m³)	53	53	54	56	58	61	65	69	73	78	81	83	84	83	79	73	68	67	67	66	63	59	56	55
NO₂ (µg/m³)	13.4	12.4	10.8	8.8	7.1	5.8	4.8	4.1	3.6	3.4	3.4	3.4	3.5	4.2	5.9	8	9.5	9.4	8.7	8.9	11.1	14.1	16.1	16.4
SO₂ (µg/m³)	4.6	4.4	3.9	3.3	2.7	2.3	2.1	1.9	1.9	1.9	2	2	2	2	2	2	2	1.8	1.6	1.5	1.8	2.3	2.6	2.5
CO (µg/m³)	144.9	141.9	139.9	139.9	138.9	135.9	131.9	128.9	126.9	126.9	126.9	127.9	128.9	132.9	141.9	152.9	160.7	164.4	164.1	164.9	169.9	177.9	182.9	183.9

← Wed, May 20

Thu, May 21, 2026

Fri, May 22 →

Niagara Falls 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.

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