Rome (2 mi NW), Oregon climate: Climate normals at a NOAA weather station
Rome (2 mi NW)'s normal year runs from 17°F December nights to 93°F July afternoons, with 8.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.3°C, December lows of −8°C, July highs of 34°C, 227 mm of precipitation a year.
- NOAA stationRome (2 mi NW)
- Station IDUSC00357310
- Location42.86°N 117.66°W
- Elevation3,405 ft (1,038 m)
On October 23, the normal high in Rome (2 mi NW) is 64°F and the normal low 26°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rome (2 mi NW).
- Jan 41° 18°
- Feb 48° 21°
- Mar 58° 25°
- Apr 64° 30°
- May 73° 38°
- Jun 83° 44°
- Jul 93° 50°
- Aug 92° 47°
- Sep 82° 38°
- Oct 68° 29°
- Nov 52° 22°
- Dec 40° 17°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Rome (2 mi NW) each month?
July is the warmest month, with normal highs of 93°F; December the coldest, with normal lows of 17°F. The most precipitation falls in May (1.45 in), the least in August (0.21 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 41°F | 18°F | 29.5°F | 0.83 | 9 | <1 | 29 | 9 h 20 min |
| February | 48°F | 21°F | 34.7°F | 0.65 | 7 | <1 | 25 | 10 h 30 min |
| March | 58°F | 25°F | 41.5°F | 0.71 | 9 | <1 | 24 | 11 h 50 min |
| April | 64°F | 30°F | 46.9°F | 1.05 | 10 | <1 | 17 | 13 h 20 min |
| May | 73°F | 38°F | 55.4°F | 1.45 | 10 | 2 | 7 | 14 h 40 min |
| June | 83°F | 44°F | 63.3°F | 1.00 | 7 | 8 | 1 | 15 h 20 min |
| July | 93°F | 50°F | 71.8°F | 0.31 | 2 | 24 | <1 | 15 h |
| August | 92°F | 47°F | 69.4°F | 0.21 | 2 | 22 | <1 | 14 h |
| September | 82°F | 38°F | 60.2°F | 0.42 | 3 | 7 | 6 | 12 h 30 min |
| October | 68°F | 29°F | 48.1°F | 0.73 | 7 | <1 | 20 | 11 h 10 min |
| November | 52°F | 22°F | 36.7°F | 0.70 | 9 | <1 | 25 | 9 h 50 min |
| December | 40°F | 17°F | 28.5°F | 0.89 | 10 | <1 | 29 | 9 h |
| Year (annual) | 66°F | 32°F | 48.8°F | 8.95 | 84 | 63 | 182 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 5°C | −8°C | −1.4°C | 21 mm |
| February | 9°C | −6°C | 1.5°C | 17 mm |
| March | 14°C | −4°C | 5.3°C | 18 mm |
| April | 18°C | −1°C | 8.3°C | 27 mm |
| May | 23°C | 3°C | 13.0°C | 37 mm |
| June | 28°C | 7°C | 17.4°C | 25 mm |
| July | 34°C | 10°C | 22.1°C | 8 mm |
| August | 33°C | 8°C | 20.8°C | 5 mm |
| September | 28°C | 3°C | 15.7°C | 11 mm |
| October | 20°C | −2°C | 8.9°C | 19 mm |
| November | 11°C | −6°C | 2.6°C | 18 mm |
| December | 5°C | −8°C | −1.9°C | 23 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357310; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Rome (2 mi NW)?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (3).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357310.
When is the last frost at Rome (2 mi NW)?
In Rome (2 mi NW), the last spring frost (32°F) comes after June 11 in half of years and after July 3 in one year in ten; the first autumn frost comes before September 10 in half of years and before August 27 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- June 111 year in 10 after July 3; 9 in 10 after May 20
- First autumn frost, half of years before
- September 101 year in 10 before August 27; 9 in 10 before September 24
NOAA puts the median frost-free season at 88 days, and the season without a hard freeze (28°F) at 118 days.
A hard freeze (28°F) comes after May 22 in half of springs and before September 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rome (2 mi NW) in zone 6b in ZIP code 97910, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 6a: the coldest night of a typical year reaches −5°F (20 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00357310; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Rome (2 mi NW)?
In a normal year in Rome (2 mi NW), 63 days a year reach 90°F (10 of them 100°F or more), 182 nights fall to 32°F or colder and 84 days bring measurable precipitation.
- Days at 90°F or more
- 63a normal year
- Days at 100°F or more
- 10a normal year
- Nights at 32°F or colder
- 182a normal year
- Days that stay below freezing
- 13high of 32°F or less
- Days with 0.01 inch of precipitation
- 84a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00357310.
How sunny is it at Rome (2 mi NW)?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds at Rome (2 mi NW), 4.6 kWh per square metre a day. July is the sunniest month (91%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 1.8 |
| February | 68% | 2.8 |
| March | 70% | 4.0 |
| April | 75% | 5.5 |
| May | 78% | 6.6 |
| June | 85% | 7.5 |
| July | 91% | 7.7 |
| August | 90% | 6.7 |
| September | 88% | 5.3 |
| October | 83% | 3.7 |
| November | 73% | 2.2 |
| December | 60% | 1.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Rome (2 mi NW) record?
A normal year at Rome (2 mi NW) brings 6,353 heating degree days, 18% more than the median U.S. place (5,373), and 484 cooling degree days, 47% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,322 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,100 | 0 |
| February | 848 | 0 |
| March | 729 | 0 |
| April | 543 | 0 |
| May | 309 | 11 |
| June | 113 | 62 |
| July | 12 | 223 |
| August | 24 | 160 |
| September | 172 | 28 |
| October | 524 | 0 |
| November | 849 | 0 |
| December | 1,130 | 0 |
| Year (annual) | 6,353 | 484 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00357310. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Rome (2 mi NW) been warmer than normal?
2025 averaged 50.9°F, 2.1°F above the 1991-2020 normal of 48.8°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 50.9°F | +2.1°F | 8.97 |
Source: observed years: ACIS, station USC00357310. A year counts only with all twelve months complete.
How does Rome (2 mi NW)'s climate compare?
Rome (2 mi NW) is warmer than 24 of the 105 places with their own NOAA record in Oregon, and wetter than 3. Across the 7,247 U.S. stations with normals, its annual mean of 48.8°F is warmer than 35%.
In the Köppen classification computed from these normals, Rome (2 mi NW) is BSk: cold semi-arid steppe. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Questions about Rome (2 mi NW)'s climate
What is the coldest month at Rome (2 mi NW)?
December, with a normal high of 40°F and a normal low of 17°F. The warmest is July (93°F by day, 50°F at night).
What is the rainiest month at Rome (2 mi NW)?
May, with 1.45 in of precipitation in a normal year; the driest is August with 0.21 in.
What plant hardiness zone is Rome (2 mi NW) in?
The USDA's 2023 map puts Rome (2 mi NW) in zone 6b in ZIP code 97910, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −5°F (20 years, 1991-2020): zone 6a.
How late can frost come at Rome (2 mi NW)?
In half of years the last 32°F night comes after June 11; in one year in ten it comes after July 3. Waiting until July 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Rome St Airport, OR21 miles from this station, 49.9°F a year
- McDermitt (26 mi N), OR33 miles from this station, 50.3°F a year
- Sheaville (1 mi SE), OR36 miles from this station, 48.3°F a year
- Silver City (5 mi W), ID43 miles from this station, 46.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made