5-day weather forecast Niagara Falls 20-05-2026

Weather forecast Niagara Falls today 20.05.2026: light rain shower, temperature from 9 °C to 18 °C.

Precipitation probability 100%. Wind up to 7.81 m/s (gusts 14.92 m/s). Air humidity 50–99%, atmospheric pressure 759–769 mm Hg, UV index up to 7.9.

Sunrise 05:48
Sunset 20:38

Waxing Crescent15% illuminated
Moonrise 09:17 · Moonset 00:27

Chart

Table

Wed, May 20, 2026

Thu, May 21 →

Forecast from 9 °C to 18 °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)	18	18	17	17	16	14	13	12	12	11	12	13	14	14	15	15	15	14	14	12	11	11	10	9
Precipitation (mm/hr)	1.35	1.12	2.09	1.48	1.51	0.4	0.09	0.23	0.18	0.01	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 (%)	58	77	100	100	100	100	100	100	100	92	47	7	2	3	14	22	32	32	48	20	57	100	71	3
Rain chance (%)	100	100	100	100	100	100	100	100	100	81	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)	7.81	6.61	6.61	6.61	4.5	4.11	3.89	3.69	3.31	3.81	4.39	4.61	4.5	4	4.39	4.61	4.81	4.5	3.5	3.11	3.31	3.81	3.81	2.89
Wind gust (m/s)	14.92	12.5	12.86	11.86	8.25	7.06	6.5	6.22	5.39	6.03	6.36	5.83	5.53	4.97	5.72	6.36	6.92	6.67	5.28	4.97	5.61	6.47	6.47	5.14
Wind direction (°)	SW 227°	SW 229°	WSW 239°	SW 236°	W 263°	NNW 331°	NNW 332°	NW 318°	NW 308°	WNW 303°	NW 307°	WNW 303°	WNW 301°	WNW 294°	WNW 289°	WNW 293°	WNW 299°	NW 312°	NW 325°	NNW 335°	N 352°	N 359°	N 356°	N 355°

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 (%)	96	98	99	98	99	98	95	93	92	87	78	67	60	56	53	51	50	51	55	60	64	61	59	60

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)	760	759	759	760	761	761	762	764	764	765	765	766	766	766	766	766	766	767	767	767	767	767	768	769

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	0.2	0.3	0.5	0.6	1.2	4.8	7.9	6.9	5	3.1	1.5	0.6	0.1	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)	6.9	4	2.3	2	2.1	2.4	2.9	3.2	4.5	5.7	6.7	7.3	7.1	6.6	5.9	5	4.6	4.3	3.9	3.7	3.6	3.6	3.7	3.8
PM10 (µg/m³)	7	4.1	2.5	2.2	2.3	2.6	3	3.3	4.6	5.8	6.8	7.3	7.2	6.6	5.9	5.1	4.6	4.3	3.9	3.7	3.6	3.6	3.8	3.8
Ozone (O₃) (µg/m³)	67	63	62	63	63	61	58	57	59	62	65	68	71	71	67	61	56	54	53	52	52	53	53	53
NO₂ (µg/m³)	7.7	8	8.3	8.5	8.7	8.7	8.6	8.4	8.2	7.9	7.7	7.5	7.5	8.1	10	12.6	14.6	15.5	15.9	15.9	15.7	15.1	14.5	14
SO₂ (µg/m³)	2.8	3.1	3.3	3.4	3.5	3.7	4	4.2	4.3	4.4	4.4	4.4	4.3	4.2	4.1	4.1	4.1	4.3	4.5	4.7	4.8	4.7	4.7	4.7
CO (µg/m³)	160.9	163.9	161.9	157.9	159.9	174.9	194.9	208.9	208.9	201.9	193.9	184.9	173.9	166.9	163.9	164.9	167.9	175.9	186.9	190.9	182.9	167.9	155.9	148.9

Wed, May 20, 2026

Thu, May 21 →

Frequently asked questions about the weather in Niagara Falls

Today in Niagara Falls the temperature ranges from 9 °C to 18 °C, wind up to 7.81 m/s. Check the detailed hourly forecast above for more information.

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

The wind speed in Niagara Falls today reaches up to 7.81 m/s with gusts up to 14.92 m/s. Check the detailed wind chart above for hourly wind data.

The air humidity in Niagara Falls today ranges from 50% to 99%. View the humidity chart above for hourly details.

The UV index in Niagara Falls today reaches up to 7.9. Check the UV index chart above for hourly values throughout the day.

The atmospheric pressure in Niagara Falls today ranges from 759 to 769 mm Hg. View the pressure chart above for hourly readings.

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

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.

Learn more about our methodology →