Oswego weather in May: Oswego, New York: normal highs, lows, rain and records for May
Oswego in May has a normal high of 66°F and a normal low of 48°F, a daily mean of 57°F, rising from 60°F on the 1st to 70°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 3.29 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 9°C, 84 mm of precipitation in May.
- NOAA stationOswego
- Station IDUSC00306314
- Location43.45°N 76.54°W
- Elevation324 ft (99 m)
- Population17,047
- Jan 31° 19°
- Feb 33° 20°
- Mar 41° 27°
- Apr 53° 37°
- May 66° 48°
- Jun 75° 57°
- Jul 80° 63°
- Aug 79° 62°
- Sep 72° 55°
- Oct 59° 45°
- Nov 47° 35°
- Dec 37° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Oswego in May?
The normal high is 66°F and the normal low 48°F, for a daily mean of 56.8°F. May is 11.5°F warmer than April and 9.3°F cooler than June. May is the 5th warmest month of the year in Oswego and the 10th wettest. Across the month the normal high rises 10°F, from 60°F on May 1 to 70°F on May 31. From one year to the next May's mean temperature typically moves about 3.4°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 43%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 60°F | 43°F | 43% | 26% |
| May 8 | 63°F | 45°F | 42% | 25% |
| May 15 | 66°F | 48°F | 41% | 24% |
| May 22 | 68°F | 50°F | 40% | 23% |
| May 31 | 70°F | 53°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 | 60°F | 43°F | 43% | 26% | 14 h 10 min |
| May 2 | 61°F | 43°F | 43% | 26% | 14 h 10 min |
| May 3 | 61°F | 44°F | 42% | 26% | 14 h 10 min |
| May 4 | 62°F | 44°F | 42% | 26% | 14 h 10 min |
| May 5 | 62°F | 44°F | 42% | 25% | 14 h 20 min |
| May 6 | 62°F | 45°F | 42% | 25% | 14 h 20 min |
| May 7 | 63°F | 45°F | 42% | 25% | 14 h 20 min |
| May 8 | 63°F | 45°F | 42% | 25% | 14 h 20 min |
| May 9 | 64°F | 46°F | 42% | 25% | 14 h 30 min |
| May 10 | 64°F | 46°F | 42% | 25% | 14 h 30 min |
| May 11 | 64°F | 46°F | 41% | 25% | 14 h 30 min |
| May 12 | 65°F | 47°F | 41% | 24% | 14 h 30 min |
| May 13 | 65°F | 47°F | 41% | 24% | 14 h 40 min |
| May 14 | 65°F | 47°F | 41% | 24% | 14 h 40 min |
| May 15 | 66°F | 48°F | 41% | 24% | 14 h 40 min |
| May 16 | 66°F | 48°F | 41% | 24% | 14 h 40 min |
| May 17 | 66°F | 48°F | 40% | 24% | 14 h 40 min |
| May 18 | 67°F | 49°F | 40% | 24% | 14 h 50 min |
| May 19 | 67°F | 49°F | 40% | 24% | 14 h 50 min |
| May 20 | 67°F | 49°F | 40% | 23% | 14 h 50 min |
| May 21 | 67°F | 50°F | 40% | 23% | 14 h 50 min |
| May 22 | 68°F | 50°F | 40% | 23% | 14 h 50 min |
| May 23 | 68°F | 50°F | 40% | 23% | 15 h |
| May 24 | 68°F | 50°F | 40% | 23% | 15 h |
| May 25 | 69°F | 51°F | 40% | 23% | 15 h |
| May 26 | 69°F | 51°F | 40% | 23% | 15 h |
| May 27 | 69°F | 51°F | 40% | 23% | 15 h |
| May 28 | 70°F | 52°F | 40% | 23% | 15 h |
| May 29 | 70°F | 52°F | 39% | 23% | 15 h 10 min |
| May 30 | 70°F | 52°F | 39% | 23% | 15 h 10 min |
| May 31 | 70°F | 53°F | 39% | 23% | 15 h 10 min |
- Normal high
- 66°FMay average
- Normal low
- 48°FMay average
- Precipitation
- 3.29 inmonth total
- Days with precipitation
- 130.01 inch or more
- Daylight
- 14 h 10 min to 15 h 10 minMay 1 to May 31
- Days at 70°F or more
- 12
- Days at 80°F or more
- 3
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00306314; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Oswego in May?
On a given May day the chance of 0.01 inch or more is 41% on average, highest around May 1 (43%). In all, 3.29 in falls on 13 days of a normal May, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00306314.
What are the records for May in Oswego?
The warmest May temperature on Oswego's official record (since 1926) is 91°F, on May 30, 1987; the coldest is 28°F, on May 1, 1943. The wettest May brought 7.47 in (1931).
The May mean against the 1991-2020 normal of 56.8°F: 2021 56.8°F (at normal), 2022 60.8°F (+4.0), 2023 55.5°F (−1.3), 2024 62.1°F (+5.3), 2025 55.5°F (−1.3), 2026 56.3°F (−0.5). 2 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.8°F | at normal | 3.05 in |
| 2022 | 60.8°F | +4.0°F | 3.83 in |
| 2023 | 55.5°F | −1.3°F | 2.45 in |
| 2024 | 62.1°F | +5.3°F | 2.98 in |
| 2025 | 55.5°F | −1.3°F | 5.14 in |
| 2026 | 56.3°F | −0.5°F | 3.61 in |
Source: records: ACIS, NWS threaded record OSWN6thr; recent months: ACIS, station USC00306314. Records and recent months use complete months only.
How does May in Oswego 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; Oswego's is 66°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.