Watertown weather in July
In July, Watertown sees average daytime highs of 81°F and overnight lows near 63°F, with 3.2 in of rain across 9.9 wet days and about 14.9 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.
Day-to-day highs hold fairly steady near 81°F through the month. The sky is clear or mostly clear about 33% of the time in July, and the air most often feels humid.
Daylight stretches from about 15 h 12 min at the start of July to 14 h 24 min by month's end. Set against the rest of the year, July is Watertown's 2nd-clearest and 11th-windiest month. For the whole year in context, see Watertown's year-round climate.
- Daytime high
- 81°
- 1st warmest
- Overnight low
- 63°
- 12th coldest
- Rainfall
- 3.2 in
- 9.9 wet days
- Daylight
- 14 h 54 min
- 4:33 AM – 7:28 PM
- Cloud cover
- 55%
- 2nd clearest
- Wind
- 7 mph
- 11th windiest
- Solar energy
- 6.21 kWh/m²
- Travel score
- 6.6
- out of 10
Watertown is city in Dodge County and Jefferson County, Wisconsin, United States.
- Density
- 739/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in July
Day-to-day highs hold fairly steady near 81°F through the month.
A typical July day in Watertown reaches about 81°F in the afternoon and slips back to 63°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 88°F. Set against its neighbours, July runs about 4°F warmer than June and about 2°F warmer than August.
| 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) | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 80 | 80 | 80 | 80 | 80 |
| Avg low (°F) | 62 | 62 | 62 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 63 | 63 | 63 | 63 | 63 | 63 | 63 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 80 | 62 |
| 2 | 80 | 62 |
| 3 | 80 | 62 |
| 4 | 80 | 63 |
| 5 | 80 | 63 |
| 6 | 80 | 63 |
| 7 | 80 | 63 |
| 8 | 81 | 63 |
| 9 | 81 | 63 |
| 10 | 81 | 63 |
| 11 | 81 | 63 |
| 12 | 81 | 63 |
| 13 | 81 | 63 |
| 14 | 81 | 64 |
| 15 | 81 | 64 |
| 16 | 81 | 64 |
| 17 | 81 | 64 |
| 18 | 81 | 64 |
| 19 | 81 | 64 |
| 20 | 81 | 64 |
| 21 | 81 | 64 |
| 22 | 81 | 64 |
| 23 | 81 | 64 |
| 24 | 81 | 64 |
| 25 | 81 | 63 |
| 26 | 81 | 63 |
| 27 | 80 | 63 |
| 28 | 80 | 63 |
| 29 | 80 | 63 |
| 30 | 80 | 63 |
| 31 | 80 | 63 |
How July really feels in Watertown
Once humidity and wind are folded in, July 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.
July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Watertown weather by month
How July compares with the rest of the year at a glance. July is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 27° / 13° | 1.6 | 7.9 | 6.6 | 9.2 | 0.0 |
| Feb | 31° / 16° | 1.6 | 6.9 | 5.5 | 10.2 | 0.0 |
| Mar | 43° / 26° | 2.3 | 8.9 | 3.9 | 11.6 | 0.8 |
| Apr | 56° / 38° | 3.7 | 12.1 | 1.9 | 13.1 | 3.5 |
| May | 67° / 49° | 3.7 | 11.8 | 0 | 14.4 | 5.8 |
| Jun | 77° / 59° | 3.9 | 11.2 | 0 | 15.1 | 6.6 |
| Jul | 81° / 63° | 3.2 | 9.9 | 0 | 14.9 | 6.6 |
| Aug | 79° / 61° | 3.5 | 10.2 | 0 | 13.8 | 6.8 |
| Sep | 72° / 53° | 2.9 | 8.8 | 0 | 12.3 | 6.9 |
| Oct | 58° / 42° | 2.8 | 9 | 0.3 | 10.8 | 4.5 |
| Nov | 44° / 30° | 2.1 | 7.9 | 2 | 9.5 | 0.9 |
| Dec | 32° / 20° | 1.9 | 7.6 | 5.4 | 8.9 | 0.0 |
Cloud cover in July
The sky is clear or mostly clear about 33% of the time in July.
Beyond those clear spells, partly cloudy skies cover about 22% of July, with mostly cloudy or overcast conditions the remaining 45%.
| 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 (%) | 56 | 57 | 57 | 57 | 56 | 57 | 57 | 56 | 56 | 56 | 56 | 55 | 55 | 55 | 54 | 54 | 53 | 53 | 52 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 55 | 55 | 55 | 56 | 56 |
| Cloudier (%) | 44 | 43 | 43 | 43 | 44 | 43 | 43 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 47 | 47 | 48 | 47 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 45 | 45 | 44 | 44 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 56 | 44 |
| 2 | 57 | 43 |
| 3 | 57 | 43 |
| 4 | 57 | 43 |
| 5 | 56 | 44 |
| 6 | 57 | 43 |
| 7 | 57 | 43 |
| 8 | 56 | 44 |
| 9 | 56 | 44 |
| 10 | 56 | 44 |
| 11 | 56 | 44 |
| 12 | 55 | 45 |
| 13 | 55 | 45 |
| 14 | 55 | 45 |
| 15 | 54 | 46 |
| 16 | 54 | 46 |
| 17 | 53 | 47 |
| 18 | 53 | 47 |
| 19 | 52 | 48 |
| 20 | 53 | 47 |
| 21 | 53 | 47 |
| 22 | 53 | 47 |
| 23 | 53 | 47 |
| 24 | 54 | 46 |
| 25 | 54 | 46 |
| 26 | 54 | 46 |
| 27 | 55 | 45 |
| 28 | 55 | 45 |
| 29 | 55 | 45 |
| 30 | 56 | 44 |
| 31 | 56 | 44 |
Chance of precipitation in July
Watertown gets around 3.2 in of rain over 9.9 wet days in July. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 33% and peaks near 35% 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 (%) | 33 | 32 | 32 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 33 | 33 | 34 | 34 | 34 | 35 | 35 | 35 | 35 | 35 | 35 | 34 | 34 |
| Rain chance (%) | |
|---|---|
| 1 | 33 |
| 2 | 32 |
| 3 | 32 |
| 4 | 31 |
| 5 | 31 |
| 6 | 31 |
| 7 | 30 |
| 8 | 30 |
| 9 | 30 |
| 10 | 30 |
| 11 | 31 |
| 12 | 31 |
| 13 | 31 |
| 14 | 31 |
| 15 | 32 |
| 16 | 32 |
| 17 | 32 |
| 18 | 32 |
| 19 | 33 |
| 20 | 33 |
| 21 | 34 |
| 22 | 34 |
| 23 | 34 |
| 24 | 35 |
| 25 | 35 |
| 26 | 35 |
| 27 | 35 |
| 28 | 35 |
| 29 | 35 |
| 30 | 34 |
| 31 | 34 |
Humidity in July
Most of July feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the humid band about 25% of days. Sticky, muggy-or-worse air turns up on roughly 32% of them.
| 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 (%) | 26 | 26 | 26 | 25 | 24 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 18 | 18 |
| Comfortable (%) | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 |
| Humid (%) | 22 | 22 | 22 | 22 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 |
| Muggy (%) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 21 | 21 |
| Oppressive (%) | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 26 | 23 | 22 | 23 | 5 | 0 |
| 2 | 26 | 23 | 22 | 23 | 5 | 0 |
| 3 | 26 | 23 | 22 | 23 | 5 | 0 |
| 4 | 25 | 23 | 22 | 23 | 6 | 0 |
| 5 | 24 | 24 | 23 | 23 | 6 | 0 |
| 6 | 24 | 24 | 23 | 23 | 6 | 0 |
| 7 | 23 | 24 | 24 | 23 | 6 | 0 |
| 8 | 22 | 24 | 24 | 23 | 6 | 0 |
| 9 | 21 | 24 | 24 | 24 | 6 | 0 |
| 10 | 20 | 24 | 25 | 24 | 7 | 0 |
| 11 | 19 | 24 | 25 | 24 | 7 | 0 |
| 12 | 18 | 24 | 25 | 25 | 7 | 1 |
| 13 | 18 | 24 | 25 | 25 | 8 | 1 |
| 14 | 17 | 23 | 26 | 25 | 8 | 1 |
| 15 | 17 | 23 | 26 | 25 | 8 | 1 |
| 16 | 17 | 23 | 26 | 25 | 8 | 1 |
| 17 | 16 | 23 | 26 | 25 | 9 | 1 |
| 18 | 16 | 23 | 26 | 25 | 9 | 1 |
| 19 | 16 | 22 | 26 | 25 | 9 | 1 |
| 20 | 16 | 22 | 26 | 25 | 9 | 1 |
| 21 | 16 | 22 | 26 | 25 | 10 | 1 |
| 22 | 16 | 23 | 26 | 25 | 10 | 1 |
| 23 | 16 | 23 | 26 | 25 | 10 | 1 |
| 24 | 16 | 23 | 26 | 24 | 10 | 1 |
| 25 | 16 | 23 | 26 | 24 | 10 | 1 |
| 26 | 17 | 24 | 27 | 23 | 10 | 0 |
| 27 | 17 | 24 | 27 | 23 | 9 | 0 |
| 28 | 17 | 24 | 27 | 22 | 9 | 0 |
| 29 | 17 | 25 | 27 | 22 | 9 | 0 |
| 30 | 18 | 25 | 27 | 21 | 9 | 0 |
| 31 | 18 | 25 | 27 | 21 | 8 | 0 |
Wind in July
Winds average 7 mph in July.
Across July, daily wind ranges from about 6 mph on the calmest days to 7 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) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in July
Daylight runs from about 15 h 12 min at the start of July to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 48 minutes over July. Sunrise moves from 4:23 AM to 4:48 AM, and sunset from 7:33 PM to 7:14 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) | 15.2 | 15.2 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.1 | 15.0 | 15.0 | 15.0 | 15.0 | 14.9 | 14.9 | 14.9 | 14.9 | 14.9 | 14.8 | 14.8 | 14.8 | 14.7 | 14.7 | 14.7 | 14.6 | 14.6 | 14.6 | 14.5 | 14.5 | 14.5 | 14.4 |
| Sunrise (AM) | 4:23 | 4:24 | 4:24 | 4:25 | 4:26 | 4:26 | 4:27 | 4:27 | 4:28 | 4:29 | 4:30 | 4:30 | 4:31 | 4:32 | 4:33 | 4:33 | 4:34 | 4:35 | 4:36 | 4:37 | 4:38 | 4:39 | 4:40 | 4:41 | 4:42 | 4:43 | 4:44 | 4:45 | 4:46 | 4:47 | 4:48 |
| Sunset (PM) | 7:33 | 7:33 | 7:33 | 7:33 | 7:32 | 7:32 | 7:32 | 7:32 | 7:31 | 7:31 | 7:30 | 7:30 | 7:29 | 7:29 | 7:28 | 7:28 | 7:27 | 7:26 | 7:25 | 7:25 | 7:24 | 7:23 | 7:22 | 7:21 | 7:20 | 7:19 | 7:18 | 7:17 | 7:16 | 7:15 | 7:14 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 15.2 | 4:23 | 7:33 |
| 2 | 15.2 | 4:24 | 7:33 |
| 3 | 15.1 | 4:24 | 7:33 |
| 4 | 15.1 | 4:25 | 7:33 |
| 5 | 15.1 | 4:26 | 7:32 |
| 6 | 15.1 | 4:26 | 7:32 |
| 7 | 15.1 | 4:27 | 7:32 |
| 8 | 15.1 | 4:27 | 7:32 |
| 9 | 15.1 | 4:28 | 7:31 |
| 10 | 15.0 | 4:29 | 7:31 |
| 11 | 15.0 | 4:30 | 7:30 |
| 12 | 15.0 | 4:30 | 7:30 |
| 13 | 15.0 | 4:31 | 7:29 |
| 14 | 14.9 | 4:32 | 7:29 |
| 15 | 14.9 | 4:33 | 7:28 |
| 16 | 14.9 | 4:33 | 7:28 |
| 17 | 14.9 | 4:34 | 7:27 |
| 18 | 14.9 | 4:35 | 7:26 |
| 19 | 14.8 | 4:36 | 7:25 |
| 20 | 14.8 | 4:37 | 7:25 |
| 21 | 14.8 | 4:38 | 7:24 |
| 22 | 14.7 | 4:39 | 7:23 |
| 23 | 14.7 | 4:40 | 7:22 |
| 24 | 14.7 | 4:41 | 7:21 |
| 25 | 14.6 | 4:42 | 7:20 |
| 26 | 14.6 | 4:43 | 7:19 |
| 27 | 14.6 | 4:44 | 7:18 |
| 28 | 14.5 | 4:45 | 7:17 |
| 29 | 14.5 | 4:46 | 7:16 |
| 30 | 14.5 | 4:47 | 7:15 |
| 31 | 14.4 | 4:48 | 7:14 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 6.21 kWh/m².
For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 6.3 kWh/m² in June across the year — July's 6.21 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) | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.9 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.4 | Intense |
| 2 | 6.4 | Intense |
| 3 | 6.4 | Intense |
| 4 | 6.4 | Intense |
| 5 | 6.4 | Intense |
| 6 | 6.4 | Intense |
| 7 | 6.4 | Intense |
| 8 | 6.4 | Intense |
| 9 | 6.3 | Intense |
| 10 | 6.3 | Intense |
| 11 | 6.3 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.2 | Intense |
| 15 | 6.2 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.2 | Intense |
| 18 | 6.1 | Intense |
| 19 | 6.1 | Intense |
| 20 | 6.1 | Intense |
| 21 | 6.1 | Intense |
| 22 | 6.0 | Intense |
| 23 | 6.0 | Intense |
| 24 | 6.0 | Intense |
| 25 | 6.0 | Bright |
| 26 | 6.0 | Bright |
| 27 | 6.0 | Bright |
| 28 | 5.9 | Bright |
| 29 | 5.9 | Bright |
| 30 | 5.9 | Bright |
| 31 | 5.9 | Bright |
Is July a good time to visit Watertown?
Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
July is a reasonable time to visit Watertown for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Watertown in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Watertown sees daytime highs around 81°F and nights near 63°F. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.
Sea temperature near Watertown in July
The nearest coast averages about 67°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 44 mi away) is warmest in August at about 70°F and coldest in March near 36°F.
It's comfortable for a long swim from Jul 29 to Aug 30 — about 1.1 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 38 | 36 | 36 | 38 | 42 | 54 | 67 | 70 | 66 | 56 | 46 | 41 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 38 | Bracing |
| Feb | 36 | Bracing |
| Mar | 36 | Bracing |
| Apr | 38 | Bracing |
| May | 42 | Bracing |
| Jun | 54 | Bracing |
| Jul | 67 | Cool |
| Aug | 70 | Refreshing |
| Sep | 66 | Cool |
| Oct | 56 | Bracing |
| Nov | 46 | Bracing |
| Dec | 41 | Bracing |
UV index in Watertown in July
Clear-sky midday UV in July peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Watertown peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. 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 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 6 | 8 | 9 | 8 | 8 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Watertown in July
Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.
Air quality in Watertown is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 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) | 10 | 12 | 13 | 12 | 13 | 14 | 15 | 14 | 11 | 8 | 8 | 9 |
| Level | Good | Moderate | Moderate | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 12 | Moderate |
| Mar | 13 | Moderate |
| Apr | 12 | Good |
| May | 13 | Moderate |
| Jun | 14 | Moderate |
| Jul | 15 | Moderate |
| Aug | 14 | Moderate |
| Sep | 11 | Good |
| Oct | 8 | Good |
| Nov | 8 | Good |
| Dec | 9 | Good |
Where is Watertown?
Watertown sits at 43.2°N, 88.7°W, 853 ft above sea level, in United States. The nearest listed city is Oconomowoc, 13 mi away.
Topography around Watertown
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Watertown.
Within 2 miles, the terrain around Watertown has only modest variations in elevation — a maximum elevation change of 180 ft around an average of 843 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 325 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,129 ft.
The land around Watertown is covered by grassland (28%), artificial surfaces (27%) and trees (26%) within 2 miles, cropland (57%) and trees (21%) within 10 miles, and cropland (47%) and trees (26%) 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 Watertown (43.1947°, -88.729°, elevation 853 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).