Rocky River weather in May
In May, Rocky River sees average daytime highs of 67°F and overnight lows near 53°F, with 3.8 in of rain across 13.6 wet days and about 14.3 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.
Highs climb over the month, from about 62°F in the first days to 72°F by the end. The sky is clear or mostly clear about 28% of the time in May, and the air most often feels dry.
Daylight stretches from about 13 h 48 min at the start of May to 14 h 42 min by month's end. Set against the rest of the year, May is Rocky River's 6th-clearest and 8th-windiest month. For the whole year in context, see Rocky River's year-round climate.
- Daytime high
- 67°
- 5th warmest
- Overnight low
- 53°
- 8th coldest
- Rainfall
- 3.8 in
- 13.6 wet days
- Daylight
- 14 h 18 min
- 5:14 AM – 7:33 PM
- Cloud cover
- 61%
- 6th clearest
- Wind
- 9 mph
- 8th windiest
- Solar energy
- 6 kWh/m²
- Travel score
- 5.6
- out of 10
Rocky River is city in Cuyahoga County, Ohio, United States.
- Density
- 1,402/km²
- people per km²
- Founded
- 1810
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Highs climb over the month, from about 62°F in the first days to 72°F by the end.
A typical May day in Rocky River reaches about 67°F in the afternoon and slips back to 53°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 55°F and 80°F. Set against its neighbours, May runs about 11°F warmer than April and about 10°F cooler than June.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 62 | 62 | 62 | 63 | 63 | 64 | 64 | 64 | 65 | 65 | 65 | 66 | 66 | 66 | 67 | 67 | 67 | 68 | 68 | 68 | 69 | 69 | 69 | 70 | 70 | 71 | 71 | 71 | 72 | 72 | 72 |
| Avg low (°F) | 47 | 47 | 48 | 48 | 49 | 49 | 49 | 50 | 50 | 51 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 53 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 56 | 57 | 57 | 58 | 58 | 58 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 62 | 47 |
| 2 | 62 | 47 |
| 3 | 62 | 48 |
| 4 | 63 | 48 |
| 5 | 63 | 49 |
| 6 | 64 | 49 |
| 7 | 64 | 49 |
| 8 | 64 | 50 |
| 9 | 65 | 50 |
| 10 | 65 | 51 |
| 11 | 65 | 51 |
| 12 | 66 | 51 |
| 13 | 66 | 52 |
| 14 | 66 | 52 |
| 15 | 67 | 52 |
| 16 | 67 | 53 |
| 17 | 67 | 53 |
| 18 | 68 | 53 |
| 19 | 68 | 54 |
| 20 | 68 | 54 |
| 21 | 69 | 55 |
| 22 | 69 | 55 |
| 23 | 69 | 55 |
| 24 | 70 | 56 |
| 25 | 70 | 56 |
| 26 | 71 | 56 |
| 27 | 71 | 57 |
| 28 | 71 | 57 |
| 29 | 72 | 58 |
| 30 | 72 | 58 |
| 31 | 72 | 58 |
How May really feels in Rocky River
Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Rocky River weather by month
How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 34° / 22° | 3.2 | 12.9 | 10.2 | 9.3 | 0.0 |
| Feb | 35° / 23° | 2.5 | 10.3 | 7 | 10.3 | 0.0 |
| Mar | 43° / 30° | 3.3 | 11.8 | 4.8 | 11.7 | 0.7 |
| Apr | 56° / 41° | 4.1 | 13.7 | 1.5 | 13.1 | 3.4 |
| May | 67° / 53° | 3.8 | 13.6 | 0 | 14.3 | 5.6 |
| Jun | 77° / 63° | 4.4 | 13.2 | 0 | 14.9 | 6.3 |
| Jul | 80° / 68° | 3.9 | 12.1 | 0 | 14.7 | 6.3 |
| Aug | 78° / 66° | 3.5 | 11.7 | 0 | 13.7 | 6.6 |
| Sep | 72° / 59° | 3.4 | 10.5 | 0 | 12.3 | 6.7 |
| Oct | 61° / 48° | 3.4 | 11.8 | 0.1 | 10.9 | 4.8 |
| Nov | 49° / 38° | 3.4 | 12.4 | 3.1 | 9.7 | 1.8 |
| Dec | 38° / 29° | 3.2 | 12.5 | 7.2 | 9.1 | 0.0 |
Cloud cover in May
The sky is clear or mostly clear about 28% 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 56%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 41 | 42 | 41 | 41 | 41 | 42 | 42 | 43 | 43 | 43 | 44 | 43 | 43 | 43 | 43 | 43 | 42 | 42 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 46 | 46 | 46 | 47 | 47 | 48 |
| Cloudier (%) | 59 | 58 | 59 | 59 | 59 | 58 | 58 | 57 | 57 | 57 | 56 | 57 | 57 | 57 | 57 | 57 | 58 | 58 | 57 | 57 | 56 | 56 | 56 | 56 | 56 | 54 | 54 | 54 | 53 | 53 | 52 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 41 | 59 |
| 2 | 42 | 58 |
| 3 | 41 | 59 |
| 4 | 41 | 59 |
| 5 | 41 | 59 |
| 6 | 42 | 58 |
| 7 | 42 | 58 |
| 8 | 43 | 57 |
| 9 | 43 | 57 |
| 10 | 43 | 57 |
| 11 | 44 | 56 |
| 12 | 43 | 57 |
| 13 | 43 | 57 |
| 14 | 43 | 57 |
| 15 | 43 | 57 |
| 16 | 43 | 57 |
| 17 | 42 | 58 |
| 18 | 42 | 58 |
| 19 | 43 | 57 |
| 20 | 43 | 57 |
| 21 | 44 | 56 |
| 22 | 44 | 56 |
| 23 | 44 | 56 |
| 24 | 44 | 56 |
| 25 | 44 | 56 |
| 26 | 46 | 54 |
| 27 | 46 | 54 |
| 28 | 46 | 54 |
| 29 | 47 | 53 |
| 30 | 47 | 53 |
| 31 | 48 | 52 |
Chance of precipitation in May
Rocky River gets around 3.8 in of rain over 13.6 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 44% and peaks near 44% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 43 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 44 | 44 |
| Rain chance (%) | |
|---|---|
| 1 | 43 |
| 2 | 43 |
| 3 | 43 |
| 4 | 43 |
| 5 | 43 |
| 6 | 44 |
| 7 | 44 |
| 8 | 44 |
| 9 | 44 |
| 10 | 44 |
| 11 | 44 |
| 12 | 44 |
| 13 | 44 |
| 14 | 44 |
| 15 | 44 |
| 16 | 44 |
| 17 | 44 |
| 18 | 44 |
| 19 | 43 |
| 20 | 43 |
| 21 | 43 |
| 22 | 43 |
| 23 | 43 |
| 24 | 43 |
| 25 | 44 |
| 26 | 44 |
| 27 | 44 |
| 28 | 44 |
| 29 | 44 |
| 30 | 44 |
| 31 | 44 |
Humidity in May
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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 90 | 89 | 89 | 87 | 86 | 85 | 84 | 82 | 82 | 80 | 80 | 80 | 78 | 77 | 76 | 74 | 73 | 72 | 70 | 68 | 66 | 63 | 62 | 60 | 58 | 56 | 54 | 53 | 51 | 50 | 49 |
| Comfortable (%) | 7 | 8 | 8 | 9 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 21 |
| Humid (%) | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 9 | 10 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 16 | 17 | 18 | 19 | 19 | 20 | 20 | 20 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 90 | 7 | 3 | 0 | 0 |
| 2 | 89 | 8 | 3 | 0 | 0 |
| 3 | 89 | 8 | 3 | 0 | 0 |
| 4 | 87 | 9 | 4 | 0 | 0 |
| 5 | 86 | 10 | 4 | 0 | 0 |
| 6 | 85 | 10 | 5 | 0 | 0 |
| 7 | 84 | 11 | 5 | 0 | 0 |
| 8 | 82 | 11 | 6 | 1 | 0 |
| 9 | 82 | 11 | 6 | 1 | 0 |
| 10 | 80 | 12 | 7 | 1 | 0 |
| 11 | 80 | 12 | 7 | 1 | 0 |
| 12 | 80 | 12 | 7 | 1 | 0 |
| 13 | 78 | 12 | 8 | 2 | 0 |
| 14 | 77 | 13 | 8 | 2 | 0 |
| 15 | 76 | 13 | 9 | 2 | 0 |
| 16 | 74 | 14 | 10 | 2 | 0 |
| 17 | 73 | 14 | 10 | 3 | 0 |
| 18 | 72 | 14 | 11 | 3 | 0 |
| 19 | 70 | 15 | 12 | 3 | 0 |
| 20 | 68 | 15 | 13 | 4 | 0 |
| 21 | 66 | 16 | 14 | 4 | 0 |
| 22 | 63 | 16 | 15 | 5 | 1 |
| 23 | 62 | 16 | 16 | 5 | 1 |
| 24 | 60 | 17 | 16 | 6 | 1 |
| 25 | 58 | 18 | 17 | 6 | 1 |
| 26 | 56 | 18 | 18 | 7 | 1 |
| 27 | 54 | 19 | 19 | 7 | 1 |
| 28 | 53 | 19 | 19 | 8 | 1 |
| 29 | 51 | 20 | 20 | 8 | 1 |
| 30 | 50 | 20 | 20 | 9 | 1 |
| 31 | 49 | 21 | 20 | 9 | 1 |
Wind in May
Winds average 9 mph in May.
Across May, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 9 | light breeze |
| 2 | 9 | light breeze |
| 3 | 9 | light breeze |
| 4 | 9 | light breeze |
| 5 | 9 | light breeze |
| 6 | 9 | light breeze |
| 7 | 9 | light breeze |
| 8 | 9 | light breeze |
| 9 | 9 | light breeze |
| 10 | 9 | light breeze |
| 11 | 9 | light breeze |
| 12 | 9 | light breeze |
| 13 | 9 | light breeze |
| 14 | 9 | light breeze |
| 15 | 9 | light breeze |
| 16 | 9 | light breeze |
| 17 | 9 | light breeze |
| 18 | 9 | light breeze |
| 19 | 9 | light breeze |
| 20 | 9 | light breeze |
| 21 | 9 | light breeze |
| 22 | 9 | light breeze |
| 23 | 9 | light breeze |
| 24 | 9 | light breeze |
| 25 | 9 | light breeze |
| 26 | 9 | light breeze |
| 27 | 9 | light breeze |
| 28 | 9 | light breeze |
| 29 | 9 | light breeze |
| 30 | 8 | light breeze |
| 31 | 8 | light breeze |
Sunrise & sunset in May
Daylight runs from about 13 h 48 min at the start of May to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 54 minutes over May. Sunrise moves from 5:32 AM to 5:02 AM, and sunset from 7:17 PM to 7:47 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 14.0 | 14.0 | 14.0 | 14.1 | 14.1 | 14.1 | 14.2 | 14.2 | 14.3 | 14.3 | 14.3 | 14.4 | 14.4 | 14.4 | 14.5 | 14.5 | 14.5 | 14.5 | 14.6 | 14.6 | 14.6 | 14.7 | 14.7 | 14.7 | 14.7 | 14.7 |
| Sunrise (AM) | 5:32 | 5:30 | 5:29 | 5:28 | 5:26 | 5:25 | 5:24 | 5:23 | 5:21 | 5:20 | 5:19 | 5:18 | 5:17 | 5:16 | 5:15 | 5:14 | 5:13 | 5:12 | 5:11 | 5:10 | 5:09 | 5:08 | 5:08 | 5:07 | 5:06 | 5:05 | 5:05 | 5:04 | 5:03 | 5:03 | 5:02 |
| Sunset (PM) | 7:17 | 7:19 | 7:20 | 7:21 | 7:22 | 7:23 | 7:24 | 7:25 | 7:26 | 7:27 | 7:28 | 7:29 | 7:30 | 7:31 | 7:32 | 7:33 | 7:34 | 7:35 | 7:36 | 7:37 | 7:38 | 7:39 | 7:40 | 7:41 | 7:42 | 7:43 | 7:44 | 7:45 | 7:46 | 7:46 | 7:47 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.8 | 5:32 | 7:17 |
| 2 | 13.8 | 5:30 | 7:19 |
| 3 | 13.8 | 5:29 | 7:20 |
| 4 | 13.9 | 5:28 | 7:21 |
| 5 | 13.9 | 5:26 | 7:22 |
| 6 | 14.0 | 5:25 | 7:23 |
| 7 | 14.0 | 5:24 | 7:24 |
| 8 | 14.0 | 5:23 | 7:25 |
| 9 | 14.1 | 5:21 | 7:26 |
| 10 | 14.1 | 5:20 | 7:27 |
| 11 | 14.1 | 5:19 | 7:28 |
| 12 | 14.2 | 5:18 | 7:29 |
| 13 | 14.2 | 5:17 | 7:30 |
| 14 | 14.3 | 5:16 | 7:31 |
| 15 | 14.3 | 5:15 | 7:32 |
| 16 | 14.3 | 5:14 | 7:33 |
| 17 | 14.4 | 5:13 | 7:34 |
| 18 | 14.4 | 5:12 | 7:35 |
| 19 | 14.4 | 5:11 | 7:36 |
| 20 | 14.5 | 5:10 | 7:37 |
| 21 | 14.5 | 5:09 | 7:38 |
| 22 | 14.5 | 5:08 | 7:39 |
| 23 | 14.5 | 5:08 | 7:40 |
| 24 | 14.6 | 5:07 | 7:41 |
| 25 | 14.6 | 5:06 | 7:42 |
| 26 | 14.6 | 5:05 | 7:43 |
| 27 | 14.7 | 5:05 | 7:44 |
| 28 | 14.7 | 5:04 | 7:45 |
| 29 | 14.7 | 5:03 | 7:46 |
| 30 | 14.7 | 5:03 | 7:46 |
| 31 | 14.7 | 5:02 | 7:47 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 6 kWh/m².
For context, solar energy here swings from a low near 1.43 kWh/m² to a high of 6.5 kWh/m² in June across the year — May's 6 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.6 | 5.6 | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.6 | Bright |
| 2 | 5.6 | Bright |
| 3 | 5.7 | Bright |
| 4 | 5.7 | Bright |
| 5 | 5.7 | Bright |
| 6 | 5.7 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.8 | Bright |
| 12 | 5.9 | Bright |
| 13 | 5.9 | Bright |
| 14 | 5.9 | Bright |
| 15 | 5.9 | Bright |
| 16 | 6.0 | Bright |
| 17 | 6.0 | Bright |
| 18 | 6.0 | Intense |
| 19 | 6.0 | Intense |
| 20 | 6.1 | Intense |
| 21 | 6.1 | Intense |
| 22 | 6.1 | Intense |
| 23 | 6.1 | Intense |
| 24 | 6.2 | Intense |
| 25 | 6.2 | Intense |
| 26 | 6.2 | Intense |
| 27 | 6.2 | Intense |
| 28 | 6.2 | Intense |
| 29 | 6.3 | Intense |
| 30 | 6.3 | Intense |
| 31 | 6.3 | Intense |
Is May a good time to visit Rocky River?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Rocky River for sightseeing.
What to pack for Rocky River in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Rocky River sees daytime highs around 67°F and nights near 53°F. Pack sun protection. Worth having: rain gear. About 14 days see rain.
Sea temperature near Rocky River in May
The nearest coast averages about 51°F 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 11 mi away) is warmest in August at about 75°F and coldest in February near 33°F.
It's comfortable for a long swim from Jun 27 to Sep 24 — about 3 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 35 | 33 | 35 | 40 | 51 | 65 | 73 | 75 | 71 | 61 | 51 | 42 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 35 | Bracing |
| Feb | 33 | Bracing |
| Mar | 35 | Bracing |
| Apr | 40 | Bracing |
| May | 51 | Bracing |
| Jun | 65 | Cool |
| Jul | 73 | Refreshing |
| Aug | 75 | Refreshing |
| Sep | 71 | Refreshing |
| Oct | 61 | Cool |
| Nov | 51 | Bracing |
| Dec | 42 | Bracing |
UV index in Rocky River in May
Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rocky River peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 6 | 8 | 9 | 8 | 7 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | High |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Rocky River in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Rocky River is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 9 | 11 | 12 | 13 | 15 | 16 | 16 | 15 | 12 | 8 | 7 | 8 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 11 | Good |
| Mar | 12 | Good |
| Apr | 13 | Moderate |
| May | 15 | Moderate |
| Jun | 16 | Moderate |
| Jul | 16 | Moderate |
| Aug | 15 | Moderate |
| Sep | 12 | Good |
| Oct | 8 | Good |
| Nov | 7 | Good |
| Dec | 8 | Good |
Where is Rocky River?
Rocky River sits at 41.5°N, 81.8°W, 689 ft above sea level, in United States. The nearest listed city is Lakewood, 1.9 mi away.
Topography around Rocky River
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Rocky River.
Within 2 miles, the terrain around Rocky River has only modest variations in elevation — a maximum elevation change of 217 ft around an average of 663 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 614 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 978 ft.
The land around Rocky River is covered by trees (36%), artificial surfaces (32%) and water (23%) within 2 miles, water (40%), trees (27%) and artificial surfaces (23%) within 10 miles, and water (42%) and trees (31%) within 50 miles.
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
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 Rocky River (41.4756°, -81.8393°, elevation 689 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).