Royal Oak, MD Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Royal Oak's primary NOAA station, ROYAL OAK 2 SSW.
The climate verdict for Royal Oak
Water is the standout signal in Royal Oak, Maryland: 47.6 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 58°F. It scores 78/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 72% of them.
- 58°F
- yearly average temperature, NOAA normal
- 78/100
- comfort score, above 72% of station-mapped location scores
- 47.6"
- annual precipitation · 14" snow
- 220 days
- growing season, frost-free days
Royal Oak: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00187806 · Royal Oak, MD 58°F mean · 47.6" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 58°F
- RANK-UPPER #4,734
- PHOTO-FINISH ≈ Paris
- PRCP-MID 47.6"
- SWING-MID 42°F
- COMF-TOP 78/100
- LOAD-HEAT 3,972 HDD
- STN-1 USC00187806
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Paris, TN (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every MD station list.
- Royal Oak (this station) 58°F
- Hot Socorro, NM 58°F
- Near Paris, TN 58°F
- Near Marshall, AR 58°F
- Near White House, TN 58°F
Climate Living Index · Royal Oak
Royal Oak: 72/100 · grade B
Royal Oak publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Royal Oak, not an official NOAA rating. Rankings still use Comfort Score 78/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 64 calendar days | 87/100 · A |
| Frost-free season | 220 days/year | 77/100 · B |
| Annual temperature balance | 58.0°F · 9.5° from 67.5°F | 70/100 · B |
| Snowfall burden | 14.1 inches/year | 57/100 · C |
| Precipitation balance | 47.6 in · 12.6 from 35 in | 56/100 · C |
Royal Oak · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Royal Oak is a temperate Köppen climate: Cfa
Coldest-month mean 36.9°F and warmest-month mean 79.1°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 79.1°F
- Coldest month
- 36.9°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Royal Oak sits across the climate record
Three NOAA fields for Royal Oak's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 69th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 25% wettest
- Royal Oak's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 45th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Royal Oak compares across U.S. station-mapped locations
Royal Oak's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
78 Top 28% score exceeds 72% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Royal Oak's measured station temperature trend
MethodologyAcross 131 complete annual observations from 1892 to 2025, ROYAL OAK 2 SSW warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Royal Oak primary station fitted change +0.10 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 45°F (7°C) | 29°F (-1°C) | 37°F (3°C) | 3.5" | 5.1" | 20.1 | 0.0 |
| February | 47°F (9°C) | 31°F (-1°C) | 39°F (4°C) | 3.1" | 4.8" | 17.3 | 0.0 |
| March | 56°F (13°C) | 37°F (3°C) | 46°F (8°C) | 4.4" | 2.3" | 9.9 | 0.0 |
| April | 67°F (19°C) | 47°F (8°C) | 57°F (14°C) | 3.7" | 0.1" | 1.1 | 0.1 |
| May | 75°F (24°C) | 56°F (13°C) | 66°F (19°C) | 4.0" | 0.0" | 0.0 | 1.0 |
| June | 84°F (29°C) | 66°F (19°C) | 75°F (24°C) | 4.0" | 0.0" | 0.0 | 5.7 |
| July | 88°F (31°C) | 70°F (21°C) | 79°F (26°C) | 4.3" | 0.0" | 0.0 | 13.2 |
| August | 86°F (30°C) | 68°F (20°C) | 77°F (25°C) | 4.8" | 0.0" | 0.0 | 9.4 |
| September | 80°F (27°C) | 62°F (16°C) | 71°F (22°C) | 4.2" | 0.0" | 0.0 | 2.6 |
| October | 69°F (21°C) | 51°F (10°C) | 60°F (15°C) | 4.4" | 0.0" | 0.2 | 0.1 |
| November | 58°F (14°C) | 41°F (5°C) | 49°F (10°C) | 3.4" | 0.0" | 5.1 | 0.0 |
| December | 49°F (9°C) | 33°F (1°C) | 41°F (5°C) | 3.9" | 1.8" | 15.3 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 88°F around July 11, short of 90°F on every date, while 64 dates carry a normal low at or below freezing, the coldest 29°F near January 21.
The freezing stretch
The normal low stays at or below 32°F into February 24, then returns to freezing around December 23, covering 64 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is April 22, when 36% of years recorded at least a hundredth of an inch. The driest is September 3 at 25%. Summed across the calendar, that is about 118 wet dates a year.
The widest day
April 18 carries the biggest normal gap between afternoon and dawn, 21°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Royal Oak.
Where Royal Oak Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 21°F.
Royal Oak earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 5.1"
10.3 days with precipitation
Snow: 4.8"
9.6 days with precipitation
Snow: 2.3"
11.0 days with precipitation
Snow: 0.1"
10.6 days with precipitation
10.8 days with precipitation
9.9 days with precipitation
9.8 days with precipitation
8.9 days with precipitation
7.9 days with precipitation
9.2 days with precipitation
8.8 days with precipitation
Snow: 1.8"
11.0 days with precipitation
Royal Oak spreads its precipitation across the year
Neither half of the year dominates here: June through August take 28% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Royal Oak has no dry season to plan around, though it does carry a 42.2°F seasonal spread.
The gap between the wettest and driest month still matters: August averages 4.8" and February 3.1". The three wettest months together take 28% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Royal Oak, it arrives in quantity
47.6" of precipitation falls across only about 118 wet days here, averaging 0.40 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 118 a year, 32% of all days
- Average depth per wet day
- 0.40 inches
- Most wet days
- March, about 11
- Fewest wet days
- September, about 8
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Royal Oak
Royal Oak averages 14.1 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 6 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 14.1 inches of depth.
- Days recording measurable snow: about 6 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 3% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
November 7
50% probability date
Last Spring Freeze
April 1
50% probability date
Growing Season
220 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,972
Higher = more heating needed
Cooling Degree Days
1,473
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MD closest to Royal Oak on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (58°F here).
- Bartlesville, OK 58°F · 0.0°F off
- Columbia, TN 58°F · 0.0°F off
- Disputanta, VA 58°F · 0.0°F off
- Hot Springs, NC 58°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (47.6" here), excluding temperature-peer places.
- Dover, DE 47.6" · 0.0" off
- Woodland, ME 47.6" · 0.0" off
- Drain, OR 47.6" · 0.0" off
- Stony Creek, VA 47.6" · 0.0" off
Snow and freeze rhythm
When cold and snow define Royal Oak
heating led · wet · mid swing
Royal Oak's energy balance leans toward cold weather: 3,972 annual heating degree days against 1,473 for cooling. Its 42.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Royal Oak's frost-free season lasts about 220 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Royal Oak coldest normal
January
The monthly mean of 37°F (3°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Royal Oak typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Royal Oak snow peak
January
Royal Oak averages 14.1 inches of snow a year, with January the snowiest month on the normals.
Questions about Royal Oak's climate
How much snow does Royal Oak get? ▼
How many days above 90°F does Royal Oak get? ▼
How much energy does heating and cooling require in Royal Oak? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Royal Oak's primary station: ROYAL OAK 2 SSW (USC00187806). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Royal Oak; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Royal Oak comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.