Greater Napanee weather in May

In May, Greater Napanee sees average daytime highs of 19°C and overnight lows near 9°C, with 77 mm of rain across 10.6 wet days and about 14.5 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 21°C by the end. The sky is clear or mostly clear about 24% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of May to 15 hours by month's end. Set against the rest of the year, May is Greater Napanee's 5th-clearest and 8th-windiest month. For the whole year in context, see Greater Napanee's year-round climate.

Daytime high
19°
5th warmest
Overnight low
8th coldest
Rainfall
77 mm
10.6 wet days
Daylight
14 h 36 min
4:47 AM – 7:21 PM
Cloud cover
64%
5th clearest
Wind
11 km/h
8th windiest
Solar energy
5.99 kWh/m²
Travel score
5.8
out of 10

Greater Napanee is town in Ontario, Canada.

Density
35/km²
people per km²
Founded
1998

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 21°C by the end.

A typical May day in Greater Napanee reaches about 19°C in the afternoon and slips back to 9°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 25°C. Set against its neighbours, May runs about 7°C warmer than April and about 5°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1166
2166
3166
4166
5176
6177
7177
8177
9177
10187
11188
12188
13188
14188
15198
16198
17199
18199
19199
20209
212010
222010
232010
242010
252110
262111
272111
282111
292111
302111
312212

How May really feels in Greater Napanee

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

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

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Greater Napanee weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -11°7110.58.59.10.0
Feb-1° / -10°568.46.710.20.0
Mar / -5°70105.611.60.2
Apr12° / 9411.3213.22.9
May19° / 7710.6014.55.8
Jun24° / 14°9011015.36.6
Jul26° / 17°87110156.5
Aug25° / 16°8610.3013.86.8
Sep21° / 12°859.2012.36.6
Oct14° / 9311.90.210.83.8
Nov / -0°8210.32.69.40.8
Dec / -6°7810.76.68.70.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
33961
44060
54060
64060
74060
84060
94060
104060
114060
124060
133961
143961
154060
164159
174159
184159
194060
204060
214060
224060
234060
244060
254159
264060
274060
284060
294159
304159
314159

Chance of precipitation in May

Any precipitation

Greater Napanee gets around 77 mm of rain over 10.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 34% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
335
435
535
635
735
835
935
1035
1135
1235
1335
1434
1534
1634
1734
1834
1934
2034
2133
2233
2333
2433
2533
2634
2734
2835
2935
3035
3135

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
197300
295410
395410
495410
594510
694510
794510
893610
993610
1093610
1192620
1291720
1391720
1491720
1590730
1690730
1788840
1887850
1987850
2085960
2183971
22811081
23801091
247811101
257712101
267612111
277313122
287214122
297114132
307015132
316916132

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 54 min at the start of May to 15 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 5:07 AM to 4:34 AM, and sunset from 7:03 PM to 7:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:077:03
214.05:057:05
314.05:047:06
414.15:027:07
514.15:017:08
614.24:597:09
714.24:587:11
814.34:577:12
914.34:557:13
1014.34:547:14
1114.44:537:15
1214.44:527:17
1314.54:507:18
1414.54:497:19
1514.54:487:20
1614.64:477:21
1714.64:467:22
1814.64:457:23
1914.74:447:24
2014.74:437:26
2114.74:427:27
2214.84:417:28
2314.84:407:29
2414.84:397:30
2514.94:387:31
2614.94:377:32
2714.94:377:33
2815.04:367:34
2915.04:357:35
3015.04:357:36
3115.04:347:36

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.99 kWh/m².

For context, solar energy here swings from a low near 1.3 kWh/m² to a high of 6.37 kWh/m² in June across the year — May's 5.99 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
146.0Bright
156.0Bright
166.0Intense
176.0Intense
186.0Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in May

Is May a good time to visit Greater Napanee?

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

5.8
Sightseeing
5th-best month of the year
2.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Greater Napanee for sightseeing.

What to pack for Greater Napanee in May

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

In May, Greater Napanee sees daytime highs around 19°C and nights near 9°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Greater Napanee in May

The nearest coast averages about 7°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in August at about 22°C and coldest in March near 1°C.

It's comfortable for a long swim from Jul 15 to Sep 11 — about 1.9 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan3Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May7Bracing
Jun15Bracing
Jul20Refreshing
Aug22Refreshing
Sep20Cool
Oct15Bracing
Nov10Bracing
Dec6Bracing

UV index in Greater Napanee in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Greater Napanee 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 December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 12UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun7Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Greater Napanee?

Greater Napanee sits at 44.3°N, 76.9°W, 92 m above sea level, in Canada. The nearest listed city is Belleville, 36 km away.

Topography around Greater Napanee

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Greater Napanee.

Within 3 km, the terrain around Greater Napanee has only modest variations in elevation — a maximum elevation change of 67 m around an average of 103 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 125 m; within 80 km, significant variations in elevation — a maximum elevation change of 352 m.

The land around Greater Napanee is covered by trees (31%), cropland (28%) and grassland (27%) within 3 km, trees (43%), grassland (27%) and cropland (21%) within 16 km, and trees (44%) and water (35%) within 80 km.

3 km
67 m
16 km
125 m
80 km
352 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Belleville 36 km · Prince Edward 37 km · Kingston 37 km · Quinte West 50 km · Watertown 88 km · Oswego 95 km · Cobourg 102 km · Brockville 107 km

Canada travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 83% of US
price level, 2025
GDP per capita
$55,698
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 53%none 35%Muslim 5%Hindu 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 Greater Napanee (44.2501°, -76.9494°, elevation 92 m), 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).