Rockville weather in July: Rockville, Maryland: normal highs, lows, rain and records for July
Rockville in July has a normal high of 87°F and a normal low of 69°F, a daily mean of 78°F, holding near 87°F all month. Measurable precipitation falls on 10 days in a normal July, 3.98 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 20°C, 101 mm of precipitation in July.
- NOAA stationRockville (1 mi NE)
- Station IDUSC00187705
- Location39.10°N 77.15°W
- Elevation440 ft (134 m)
- From the center1 miles
- Population68,417
- Jan 42° 27°
- Feb 45° 28°
- Mar 54° 36°
- Apr 66° 46°
- May 74° 55°
- Jun 82° 64°
- Jul 87° 69°
- Aug 85° 67°
- Sep 78° 60°
- Oct 66° 48°
- Nov 56° 38°
- Dec 46° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rockville in July?
The normal high is 87°F and the normal low 69°F, for a daily mean of 78.0°F. July is 5.1°F warmer than June and 2.1°F warmer than August. July is the warmest month of the year in Rockville and the 2nd wettest. Across the month the normal high rises 1°F, from 86°F on July 1 to 87°F on July 31. From one year to the next July's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Julys in three average between 76°F and 80°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 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 86°F | 68°F | 31% | 20% |
| July 8 | 87°F | 69°F | 31% | 20% |
| July 15 | 88°F | 69°F | 30% | 19% |
| July 22 | 87°F | 69°F | 30% | 19% |
| July 31 | 87°F | 69°F | 29% | 19% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 13, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 86°F | 68°F | 31% | 20% | 14 h 50 min |
| July 2 | 87°F | 68°F | 31% | 20% | 14 h 50 min |
| July 3 | 87°F | 68°F | 31% | 20% | 14 h 50 min |
| July 4 | 87°F | 68°F | 31% | 20% | 14 h 50 min |
| July 5 | 87°F | 68°F | 31% | 20% | 14 h 50 min |
| July 6 | 87°F | 69°F | 31% | 20% | 14 h 50 min |
| July 7 | 87°F | 69°F | 31% | 20% | 14 h 50 min |
| July 8 | 87°F | 69°F | 31% | 20% | 14 h 50 min |
| July 9 | 87°F | 69°F | 31% | 19% | 14 h 50 min |
| July 10 | 87°F | 69°F | 30% | 19% | 14 h 50 min |
| July 11 | 87°F | 69°F | 30% | 19% | 14 h 50 min |
| July 12 | 87°F | 69°F | 30% | 19% | 14 h 40 min |
| July 13 | 88°F | 69°F | 30% | 19% | 14 h 40 min |
| July 14 | 88°F | 69°F | 30% | 19% | 14 h 40 min |
| July 15 | 88°F | 69°F | 30% | 19% | 14 h 40 min |
| July 16 | 88°F | 69°F | 30% | 19% | 14 h 40 min |
| July 17 | 88°F | 69°F | 30% | 19% | 14 h 40 min |
| July 18 | 87°F | 69°F | 30% | 19% | 14 h 40 min |
| July 19 | 87°F | 69°F | 30% | 19% | 14 h 40 min |
| July 20 | 87°F | 69°F | 30% | 19% | 14 h 30 min |
| July 21 | 87°F | 69°F | 30% | 19% | 14 h 30 min |
| July 22 | 87°F | 69°F | 30% | 19% | 14 h 30 min |
| July 23 | 87°F | 69°F | 30% | 19% | 14 h 30 min |
| July 24 | 87°F | 69°F | 30% | 19% | 14 h 30 min |
| July 25 | 87°F | 69°F | 30% | 19% | 14 h 30 min |
| July 26 | 87°F | 69°F | 30% | 19% | 14 h 20 min |
| July 27 | 87°F | 69°F | 30% | 19% | 14 h 20 min |
| July 28 | 87°F | 69°F | 30% | 19% | 14 h 20 min |
| July 29 | 87°F | 69°F | 30% | 19% | 14 h 20 min |
| July 30 | 87°F | 69°F | 29% | 19% | 14 h 20 min |
| July 31 | 87°F | 69°F | 29% | 19% | 14 h 20 min |
- Normal high
- 87°FJuly average
- Normal low
- 69°FJuly average
- Precipitation
- 3.98 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 10
- Daylight
- 14 h 50 min to 14 h 20 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 27
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00187705; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rockville in July?
On a given July day the chance of 0.01 inch or more is 30% on average, highest around July 1 (31%). In all, 3.98 in falls on 10 days of a normal July, 1 of them with an inch or more.
In a normal July in Rockville, 10 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00187705.
What are the records for July in Rockville?
The warmest July temperature on this station's record (since 1907) is 101°F, on July 24, 1914; the coldest is 38°F, on July 6, 1979. The wettest July brought 9.79 in (1975).
Source: records: ACIS, station USC00187705. Records and recent months use complete months only.
How does July in Rockville compare across Maryland?
Across the 26 places PlainClimate covers in Maryland, July normal highs run from 79°F in Frostburg to 90°F in Vienna; Rockville's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.