Niagara Falls weather in May: Niagara Falls, New York: normal highs, lows, rain and records for May
Niagara Falls in May has a normal high of 68°F and a normal low of 46°F, a daily mean of 57°F, rising from 62°F on the 1st to 73°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 3.03 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 20°C and low of 8°C, 77 mm of precipitation in May.
- NOAA stationNiagara Falls International Airport
- Station IDUSW00004724
- Location43.11°N 78.95°W
- Elevation585 ft (178 m)
- From the center4 miles
- Population47,512
- Jan 32° 17°
- Feb 33° 17°
- Mar 41° 25°
- Apr 55° 34°
- May 68° 46°
- Jun 76° 56°
- Jul 81° 61°
- Aug 79° 60°
- Sep 73° 52°
- Oct 60° 42°
- Nov 47° 32°
- Dec 37° 24°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Niagara Falls in May?
The normal high is 68°F and the normal low 46°F, for a daily mean of 56.6°F. May is 12.2°F warmer than April and 9.7°F cooler than June. May is the 5th warmest month of the year in Niagara Falls and the 5th wettest. Across the month the normal high rises 11°F, from 62°F on May 1 to 73°F on May 31. From one year to the next May's mean temperature typically moves about 3.3°F either way (NOAA's standard deviation), so roughly two Mays in three average between 53°F and 60°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 44%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 62°F | 40°F | 44% | 23% |
| May 8 | 65°F | 43°F | 43% | 23% |
| May 15 | 68°F | 45°F | 42% | 24% |
| May 22 | 70°F | 48°F | 41% | 23% |
| May 31 | 73°F | 51°F | 39% | 23% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 62°F | 40°F | 44% | 23% | 14 h |
| May 2 | 62°F | 40°F | 44% | 23% | 14 h 10 min |
| May 3 | 63°F | 41°F | 44% | 23% | 14 h 10 min |
| May 4 | 63°F | 41°F | 43% | 23% | 14 h 10 min |
| May 5 | 64°F | 42°F | 43% | 23% | 14 h 10 min |
| May 6 | 64°F | 42°F | 43% | 23% | 14 h 20 min |
| May 7 | 64°F | 42°F | 43% | 23% | 14 h 20 min |
| May 8 | 65°F | 43°F | 43% | 23% | 14 h 20 min |
| May 9 | 65°F | 43°F | 43% | 23% | 14 h 20 min |
| May 10 | 66°F | 44°F | 43% | 24% | 14 h 30 min |
| May 11 | 66°F | 44°F | 43% | 24% | 14 h 30 min |
| May 12 | 66°F | 44°F | 43% | 24% | 14 h 30 min |
| May 13 | 67°F | 45°F | 43% | 24% | 14 h 30 min |
| May 14 | 67°F | 45°F | 42% | 24% | 14 h 40 min |
| May 15 | 68°F | 45°F | 42% | 24% | 14 h 40 min |
| May 16 | 68°F | 46°F | 42% | 24% | 14 h 40 min |
| May 17 | 68°F | 46°F | 42% | 23% | 14 h 40 min |
| May 18 | 69°F | 47°F | 41% | 23% | 14 h 40 min |
| May 19 | 69°F | 47°F | 41% | 23% | 14 h 50 min |
| May 20 | 69°F | 47°F | 41% | 23% | 14 h 50 min |
| May 21 | 70°F | 48°F | 41% | 23% | 14 h 50 min |
| May 22 | 70°F | 48°F | 41% | 23% | 14 h 50 min |
| May 23 | 70°F | 48°F | 40% | 23% | 14 h 50 min |
| May 24 | 71°F | 49°F | 40% | 23% | 15 h |
| May 25 | 71°F | 49°F | 40% | 23% | 15 h |
| May 26 | 71°F | 49°F | 40% | 23% | 15 h |
| May 27 | 71°F | 50°F | 40% | 23% | 15 h |
| May 28 | 72°F | 50°F | 40% | 23% | 15 h |
| May 29 | 72°F | 51°F | 40% | 23% | 15 h |
| May 30 | 72°F | 51°F | 39% | 23% | 15 h 10 min |
| May 31 | 73°F | 51°F | 39% | 23% | 15 h 10 min |
- Normal high
- 68°FMay average
- Normal low
- 46°FMay average
- Precipitation
- 3.03 inmonth total
- Days with precipitation
- 130.01 inch or more
- Nights at 32°F or colder
- 1
- Daylight
- 14 h to 15 h 10 minMay 1 to May 31
- Days at 70°F or more
- 15
- Days at 80°F or more
- 5
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00004724; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Niagara Falls in May?
On a given May day the chance of 0.01 inch or more is 42% on average, highest around May 1 (44%). In all, 3.03 in falls on 13 days of a normal May, 1 of them with an inch or more.
In a normal May in Niagara Falls, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00004724.
How humid and windy is Niagara Falls in May?
At 3 p.m. the normal temperature is 71°F with 52% relative humidity and a dew point of 52°F; at 6 a.m. it is 56°F with 83% humidity. The wind averages 8.7 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 56°F | 51°F | 83% | 6.7 mph | 49% |
| 9 a.m. | 64°F | 52°F | 65% | 9.7 mph | – |
| noon | 69°F | 52°F | 55% | 11.3 mph | 24% |
| 3 p.m. | 71°F | 52°F | 52% | 12.0 mph | 27% |
| 6 p.m. | 68°F | 52°F | 56% | 10.4 mph | 29% |
| 9 p.m. | 61°F | 52°F | 71% | 7.2 mph | 36% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00004724. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Niagara Falls?
The warmest May temperature on this station's record (since 1951) is 93°F, on May 30, 2018; the coldest is 24°F, on May 12, 2020. The wettest May brought 6.52 in (2011).
The May mean against the 1991-2020 normal of 56.6°F: 2021 55.9°F (−0.7), 2022 60.9°F (+4.3), 2023 57.1°F (+0.5), 2024 64.0°F (+7.4), 2025 56.2°F (−0.4), 2026 55.5°F (−1.1). 3 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 55.9°F | −0.7°F | 0.40 in |
| 2022 | 60.9°F | +4.3°F | 1.88 in |
| 2023 | 57.1°F | +0.5°F | 0.33 in |
| 2024 | 64.0°F | +7.4°F | 1.63 in |
| 2025 | 56.2°F | −0.4°F | 3.13 in |
| 2026 | 55.5°F | −1.1°F | – |
Source: records: ACIS, station USW00004724; recent months: ACIS, station USW00004724. Records and recent months use complete months only.
How does May in Niagara Falls compare across New York?
Across the 131 places PlainClimate covers in New York, May normal highs run from 60°F in Cooperstown to 74°F in Hudson; Niagara Falls's is 68°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.