Watertown weather in July: Watertown, South Dakota: normal highs, lows, rain and records for July
Watertown in July has a normal high of 82°F and a normal low of 60°F, a daily mean of 71°F, holding near 82°F all month. Measurable precipitation falls on 10 days in a normal July, 3.05 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 16°C, 77 mm of precipitation in July.
- NOAA stationWatertown Regional Airport
- Station IDUSW00014946
- Location44.90°N 97.15°W
- Elevation1,748 ft (533 m)
- Population23,492
- Jan 21° 3°
- Feb 26° 7°
- Mar 39° 20°
- Apr 54° 32°
- May 67° 45°
- Jun 77° 55°
- Jul 82° 60°
- Aug 80° 58°
- Sep 72° 49°
- Oct 56° 35°
- Nov 40° 21°
- Dec 26° 9°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Watertown in July?
The normal high is 82°F and the normal low 60°F, for a daily mean of 71.0°F. July is 4.9°F warmer than June and 2.5°F warmer than August. July is the warmest month of the year in Watertown and the 2nd wettest. Across the month the normal high rises 1°F, from 81°F on July 1 to 82°F on July 31. From one year to the next July's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Julys in three average between 68°F and 74°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 81°F | 59°F | 34% | 21% |
| July 8 | 82°F | 60°F | 32% | 20% |
| July 15 | 82°F | 60°F | 31% | 19% |
| July 22 | 82°F | 60°F | 30% | 19% |
| July 31 | 82°F | 60°F | 29% | 18% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 18, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 81°F | 59°F | 34% | 21% | 15 h 30 min |
| July 2 | 81°F | 59°F | 34% | 21% | 15 h 30 min |
| July 3 | 81°F | 59°F | 33% | 21% | 15 h 30 min |
| July 4 | 81°F | 59°F | 33% | 20% | 15 h 30 min |
| July 5 | 81°F | 60°F | 33% | 20% | 15 h 30 min |
| July 6 | 82°F | 60°F | 32% | 20% | 15 h 30 min |
| July 7 | 82°F | 60°F | 32% | 20% | 15 h 30 min |
| July 8 | 82°F | 60°F | 32% | 20% | 15 h 30 min |
| July 9 | 82°F | 60°F | 32% | 20% | 15 h 30 min |
| July 10 | 82°F | 60°F | 31% | 19% | 15 h 20 min |
| July 11 | 82°F | 60°F | 31% | 19% | 15 h 20 min |
| July 12 | 82°F | 60°F | 31% | 19% | 15 h 20 min |
| July 13 | 82°F | 60°F | 31% | 19% | 15 h 20 min |
| July 14 | 82°F | 60°F | 31% | 19% | 15 h 20 min |
| July 15 | 82°F | 60°F | 31% | 19% | 15 h 20 min |
| July 16 | 82°F | 60°F | 31% | 19% | 15 h 20 min |
| July 17 | 82°F | 60°F | 30% | 19% | 15 h 10 min |
| July 18 | 83°F | 60°F | 30% | 19% | 15 h 10 min |
| July 19 | 83°F | 60°F | 30% | 19% | 15 h 10 min |
| July 20 | 82°F | 60°F | 30% | 19% | 15 h 10 min |
| July 21 | 82°F | 60°F | 30% | 19% | 15 h 10 min |
| July 22 | 82°F | 60°F | 30% | 19% | 15 h 10 min |
| July 23 | 82°F | 60°F | 30% | 19% | 15 h |
| July 24 | 82°F | 60°F | 30% | 18% | 15 h |
| July 25 | 82°F | 60°F | 30% | 18% | 15 h |
| July 26 | 82°F | 60°F | 30% | 18% | 15 h |
| July 27 | 82°F | 60°F | 30% | 18% | 15 h |
| July 28 | 82°F | 60°F | 29% | 18% | 14 h 50 min |
| July 29 | 82°F | 60°F | 29% | 18% | 14 h 50 min |
| July 30 | 82°F | 60°F | 29% | 18% | 14 h 50 min |
| July 31 | 82°F | 60°F | 29% | 18% | 14 h 50 min |
- Normal high
- 82°FJuly average
- Normal low
- 60°FJuly average
- Precipitation
- 3.05 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 15 h 30 min to 14 h 50 minJuly 1 to July 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 21
- Sunshine
- 85%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014946; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Watertown in July?
On a given July day the chance of 0.01 inch or more is 31% on average, highest around July 1 (34%). In all, 3.05 in falls on 10 days of a normal July, 1 of them with an inch or more.
In a normal July in Watertown, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014946.
How humid and windy is Watertown in July?
At 3 p.m. the normal temperature is 79°F with 52% relative humidity and a dew point of 60°F; at 6 a.m. it is 62°F with 89% humidity. The wind averages 8.4 mph, most often from the south-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 62°F | 58°F | 89% | 6.4 mph | 73% |
| 9 a.m. | 71°F | 61°F | 70% | 9.9 mph | 77% |
| noon | 77°F | 60°F | 56% | 10.9 mph | 73% |
| 3 p.m. | 79°F | 60°F | 52% | 11.2 mph | 73% |
| 6 p.m. | 77°F | 61°F | 57% | 10.3 mph | 76% |
| 9 p.m. | 69°F | 61°F | 76% | 6.5 mph | 81% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014946. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Watertown?
The warmest July temperature on this station's record (since 1893) is 110°F, on July 21, 1934; the coldest is 35°F, on July 3, 1917. The wettest July brought 10.36 in (1963).
The July mean against the 1991-2020 normal of 71.0°F: 2021 72.8°F (+1.8), 2022 72.3°F (+1.3), 2023 69.7°F (−1.3), 2024 71.6°F (+0.6), 2025 70.8°F (−0.2), 2026 74.7°F (+3.7). 4 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.8°F | +1.8°F | 2.68 in |
| 2022 | 72.3°F | +1.3°F | 3.01 in |
| 2023 | 69.7°F | −1.3°F | 1.34 in |
| 2024 | 71.6°F | +0.6°F | 3.17 in |
| 2025 | 70.8°F | −0.2°F | 6.67 in |
| 2026 | 74.7°F | +3.7°F | 5.04 in |
Source: records: ACIS, station USW00014946; recent months: ACIS, station USW00014946. Records and recent months use complete months only.
How does July in Watertown compare across South Dakota?
Across the 100 places PlainClimate covers in South Dakota, July normal highs run from 79°F in Custer to 91°F in Interior; Watertown's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.