Oswego weather in April

In April, Oswego sees average daytime highs of 48°F and overnight lows near 38°F, with 4.4 in of precipitation across 12.8 wet days and about 13.2 hours of daylight. It is the 7th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 43°F in the first days to 52°F by the end. The sky is clear or mostly clear about 28% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 48 min by month's end. Set against the rest of the year, April is Oswego's 6th-clearest and 7th-windiest month. For the whole year in context, see Oswego's year-round climate.

Daytime high
48°
7th warmest
Overnight low
38°
5th coldest
Precipitation
4.4 in
12.8 wet days
Daylight
13 h 12 min
5:30 AM – 6:42 PM
Cloud cover
63%
6th clearest
Wind
10 mph
7th windiest
Solar energy
4.9 kWh/m²
Travel score
1.6
out of 10

Oswego is city in and county seat of Oswego County, New York, United States.

Density
612/km²
people per km²
Founded
1796

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 43°F in the first days to 52°F by the end.

A typical April day in Oswego reaches about 48°F in the afternoon and slips back to 38°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 39°F and 59°F. Set against its neighbours, April runs about 10°F warmer than March and about 10°F cooler than May.

20°30°40°50°60°70°151015202530
Avg high (°F)Avg low (°F)
14333
24333
34334
44434
54434
64435
74535
84535
94636
104636
114636
124737
134737
144737
154838
164838
174938
184939
194939
205039
215040
225040
235140
245140
255141
265141
275241
285242
295242
305342

How April really feels in Oswego

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 17 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
17
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Oswego weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 22°4.117.715.69.10.0
Feb32° / 21°3.112.41010.20.0
Mar38° / 27°3.512.46.511.60.0
Apr48° / 38°4.412.82.113.21.6
May58° / 47°3.611.4014.54.2
Jun68° / 58°4.212015.26.1
Jul75° / 66°4.412.1014.96.8
Aug75° / 66°4.312.7013.86.8
Sep69° / 59°4.411.5012.36.2
Oct58° / 49°5.415.4010.83.8
Nov47° / 38°4.616.23.99.51.3
Dec38° / 30°4.818.911.88.80.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24159
34060
44060
54060
64060
74060
84060
94060
104060
114060
124159
134258
144258
154258
164258
174357
184357
194357
204357
214357
224258
234258
244357
254357
264357
274357
284357
294456
304456

Chance of precipitation in April

Any precipitationSnow

Oswego gets around 4.4 in of rain and snow over 12.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 42% and peaks near 44% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
14312
24312
34412
44412
54412
64411
74311
84311
94310
104210
11429
12428
13417
14417
15416
16415
17415
18414
19424
20424
21423
22423
23423
24423
25422
26422
27422
28412
29412
30411

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
28991
29991
30991

Wind in April

Winds average 10 mph in April.

Across April, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over April. Sunrise moves from 5:57 AM to 5:08 AM, and sunset from 6:24 PM to 6:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:576:24
212.55:566:25
312.55:546:26
412.65:526:28
512.65:506:29
612.75:486:30
712.75:466:31
812.85:456:32
912.85:436:34
1012.95:416:35
1112.95:396:36
1213.05:376:37
1313.05:366:38
1413.15:346:40
1513.15:326:41
1613.25:306:42
1713.25:296:43
1813.35:276:44
1913.35:256:46
2013.45:246:47
2113.45:226:48
2213.55:206:49
2313.55:196:50
2413.65:176:52
2513.65:166:53
2613.75:146:54
2713.75:136:55
2813.85:116:56
2913.85:096:58
3013.85:086:59

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.9 kWh/m².

For context, solar energy here swings from a low near 1.22 kWh/m² to a high of 6.36 kWh/m² in June across the year — April's 4.9 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.5Bright
54.5Bright
64.5Bright
74.6Bright
84.6Bright
94.7Bright
104.7Bright
114.8Bright
124.8Bright
134.8Bright
144.9Bright
154.9Bright
165.0Bright
175.0Bright
185.0Bright
195.1Bright
205.1Bright
215.1Bright
225.2Bright
235.2Bright
245.3Bright
255.3Bright
265.3Bright
275.4Bright
285.4Bright
295.5Bright
305.5Bright
Planning a trip in April

Is April a good time to visit Oswego?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

1.6
Sightseeing
7th-best month of the year
0.0
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Oswego.

What to pack for Oswego in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Oswego sees daytime highs around 48°F and nights near 38°F. Pack a warm layer. Worth having: rain gear and sun protection. About 13 days see rain.

a warm layerrain gearsun protection

Sea temperature near Oswego in April

The nearest coast averages about 38°F in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 8 mi away) is warmest in August at about 72°F and coldest in March near 37°F.

It's comfortable for a long swim from Jul 15 to Sep 13 — about 2 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan40Bracing
Feb37Bracing
Mar37Bracing
Apr38Bracing
May43Bracing
Jun57Bracing
Jul69Refreshing
Aug72Refreshing
Sep68Cool
Oct58Bracing
Nov50Bracing
Dec44Bracing

UV index in Oswego in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oswego peaks around July 12 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 12UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Oswego?

Oswego sits at 43.5°N, 76.5°W, 285 ft above sea level, in United States. The nearest listed city is Clay, 25 mi away.

Topography around Oswego

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Oswego.

Within 2 miles, the terrain around Oswego has only modest variations in elevation — a maximum elevation change of 240 ft around an average of 305 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 354 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,801 ft.

The land around Oswego is covered by trees (39%) and water (30%) within 2 miles, water (47%) and trees (42%) within 10 miles, and trees (41%) and water (39%) within 50 miles.

2 miles
240 ft
10 miles
354 ft
50 miles
1,801 ft
treesgrasslandcroplandartificial surfaceswaterwetland
April weather nearby: Clay 25 mi · Cicero 27 mi · Syracuse 34 mi · Auburn 36 mi · Watertown 47 mi · Prince Edward 53 mi · Kingston 53 mi · Rome 55 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Oswego (43.4554°, -76.5105°, elevation 285 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).