Niagara Falls, NY weather in May
Expect mild weather with frequent rain in Niagara Falls in May, with highs near 67°F and lows near 48°F. Rain falls on about 13 days.
- Normal high
- 67°F
- Normal low
- 48°F
- Wet days
- 13
- 3.1 in total
- Muggy days
- 0
- dew point 65°F+
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 62°F | 72°F |
| Normal low | 43°F | 54°F |
| Chance of a wet day | 42% | 39% |
| Sunrise / sunset | 6:09 am / 8:17 pm | 5:39 am / 8:47 pm |
| Daylight | 14.1 h | 15.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical May day
- 6 am50°Fdew point 45°F
- 9 am59°Fdew point 46°F
- Noon64°Fdew point 46°F
- 3 pm65°Fdew point 46°F
- 6 pm63°Fdew point 45°F
- 9 pm56°Fdew point 45°F
NOAA hourly normals (local standard time) from Niagara Falls Intl Airport (6 mi away); average wind 9 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F14 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow13 of 31
- Notable rainat least 0.10 in7 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 3.1 in; a dry May brings about 2.3 in and a wet one about 4.2 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How May varies from year to year
- Warmest May, 1991-20202018: average high 75°F
- Coolest May1997: average high 59°F
- Wettest May2017: 7.8 in
- Driest May2007: 0.8 in
- Highest reading93°F (May 26, 2020)
- Lowest reading29°F (May 9, 2020)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 55°F | 67°F | 76°F |
| Normal low | 37°F | 48°F | 58°F |
| Wet days | 13 | 13 | 11 |
| Comfortable days | 6 | 14 | 13 |
| Daylight | 13.4 h | 14.7 h | 15.3 h |
Highs change by +12°F from April and +9°F into June.
Nearby alternatives in May
- Warmer: Morgantown, WV244 mi · high 74°F · 15 wet days
How Niagara Falls ranks in May
- Normal high312th warmest of 378 cities; 8th of 10 in New York
- Wet days318th driest of 378
- Comfortable days134th most of 339
What to pack for Niagara Falls in May
- A rain jacket or umbrella – rain on about 13 days
Heating and cooling
May has 254 heating degree days and 32 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How cold is Niagara Falls in May?
The normal high is 67°F and the normal low is 48°F. From 1991 to 2020 the coldest May reading was 29°F (May 9, 2020).
Does it rain a lot in Niagara Falls in May?
About 13 days in May have at least 0.01 in of precipitation, and the normal total is 3.1 in. The wettest May in 1991-2020 was in 2017 (7.8 in); the driest was in 2007 (0.8 in).
Is May a good time to visit Niagara Falls?
May ranks 1st of 12 months on our comfort score for Niagara Falls (72 out of 100). It has about 14 comfortable days. The best months are May, June and September.
Where the numbers come from
- Temperature: Buffalo (USW00014733), 19 mi ESE of the city center, 693 ft (78 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Rain, snowfall, snow depth and frost dates: Niagara Falls (USC00305840), 4.3 mi E of the city center, 588 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Niagara Falls Intl Airport (USW00004724), 5.7 mi E of the city center, 585 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Niagara Falls Intl Airport (725287-04724), 6.1 mi E of the city center, 585 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).