Anna, IL Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Anna's primary NOAA station, ANNA 2 NNE.
The climate verdict for Anna
Water is the standout signal in Anna, Illinois: 51.1 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 59°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 59°F
- yearly average temperature, NOAA normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 51.1"
- annual precipitation · 10" snow
- 204 days
- frost-free days per growing season
Anna: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00110187 · Anna, IL 59°F mean · 51.1" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 59°F
- RANK-UPPER #4,871
- PHOTO-FINISH ≈ Pocahontas
- PRCP-WET 51.1"
- SWING-MID 44°F
- COMF-MID 68/100
- LOAD-HEAT 3,977 HDD
- STN-1 USC00110187
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Pocahontas, AR (+ 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 IL station list.
- Anna (this station) 59°F
- Hot Poplar Bluff, MO 59°F
- Near Pocahontas, AR 59°F
- Near Neosho, MO 59°F
- Cold Canyon, TX 58°F
Climate Living Index · Anna
Anna: 67/100 · grade C
Anna publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Anna, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 87 calendar days | 80/100 · B |
| Annual temperature balance | 58.5°F · 9.0° from 67.5°F | 71/100 · B |
| Frost-free season | 204 days/year | 67/100 · C |
| Snowfall burden | 10.4 inches/year | 63/100 · C |
| Precipitation balance | 51.1 in · 16.1 from 35 in | 43/100 · D |
Anna · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Anna is a temperate Köppen climate: Cfa
Coldest-month mean 35.3°F and warmest-month mean 79.2°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
- 79.2°F
- Coldest month
- 35.3°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 Anna sits across the climate record
Three NOAA fields for Anna's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 29% warmest
- Among 6,861 stations, Anna sits in the warmer third of annual means.
- Annual precipitation
- Top 17% wettest
- Anna's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 53rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Anna compares across U.S. station-mapped locations
Anna's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% 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%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 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
Anna's measured station temperature trend
MethodologyAcross 102 complete annual observations from 1876 to 2025, ANNA 2 NNE changed little at a fitted rate of 0.01°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Anna primary station fitted change -0.01 °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) | 25°F (-4°C) | 35°F (2°C) | 3.5" | 2.6" | 24.3 | 0.0 |
| February | 50°F (10°C) | 29°F (-2°C) | 40°F (4°C) | 3.4" | 4.0" | 19.2 | 0.0 |
| March | 61°F (16°C) | 37°F (3°C) | 49°F (9°C) | 4.8" | 0.9" | 12.5 | 0.0 |
| April | 71°F (22°C) | 46°F (8°C) | 59°F (15°C) | 5.6" | 0.0" | 3.7 | 0.0 |
| May | 79°F (26°C) | 56°F (13°C) | 68°F (20°C) | 5.9" | 0.0" | 0.0 | 0.5 |
| June | 87°F (31°C) | 65°F (18°C) | 76°F (24°C) | 5.0" | 0.0" | 0.0 | 8.4 |
| July | 90°F (32°C) | 69°F (20°C) | 79°F (26°C) | 3.7" | 0.0" | 0.0 | 14.7 |
| August | 89°F (32°C) | 67°F (19°C) | 78°F (26°C) | 3.1" | 0.0" | 0.0 | 14.9 |
| September | 84°F (29°C) | 59°F (15°C) | 71°F (22°C) | 3.5" | 0.0" | 0.1 | 4.5 |
| October | 73°F (23°C) | 48°F (9°C) | 60°F (16°C) | 3.9" | 0.2" | 2.3 | 0.0 |
| November | 59°F (15°C) | 37°F (3°C) | 48°F (9°C) | 4.5" | 0.1" | 12.1 | 0.0 |
| December | 48°F (9°C) | 30°F (-1°C) | 39°F (4°C) | 4.1" | 2.6" | 20.8 | 0.0 |
The year, day by day
Anna works both ends of the calendar. Normal highs climb to 90°F by August 5 and hold at or above 90°F on 4 dates, then normal lows drop to freezing or below on 83 dates, bottoming at 25°F around January 16.
When the heat sits
Normal highs reach 90°F from August 5 through August 8, covering 4 dates. The broader mild season, normal highs of 70°F or more, runs April 10 to October 23.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into February 25, then returns to freezing around December 5, covering 83 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 May 2, when 40% of years recorded at least a hundredth of an inch. The driest is September 10 at 23%. Summed across the calendar, that is about 108 wet dates a year.
The widest day
April 2 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Anna.
Where Anna Stands Nationally
The normal water year runs well above the national norm at roughly 51 inches.
Anna 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: 2.6"
8.4 days with precipitation
Snow: 4.0"
8.4 days with precipitation
Snow: 0.9"
9.7 days with precipitation
10.3 days with precipitation
11.7 days with precipitation
9.4 days with precipitation
8.0 days with precipitation
7.2 days with precipitation
7.0 days with precipitation
Snow: 0.2"
8.5 days with precipitation
Snow: 0.1"
9.7 days with precipitation
Snow: 2.6"
9.8 days with precipitation
Anna spreads its precipitation across the year
Neither half of the year dominates here: June through August take 23% of the annual total and December through February 22%, with neither reaching the 35% that would mark a distinct wet season. Anna has no dry season to plan around, though it does carry a 43.9°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 5.9" and August 3.1". The three wettest months together take 32% 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 Anna, it arrives in quantity
51.1" of precipitation falls across only about 108 wet days here, averaging 0.47 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 108 a year, 30% of all days
- Average depth per wet day
- 0.47 inches
- Most wet days
- May, about 12
- Fewest wet days
- September, about 7
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.
Snow reaches Anna, but rarely amounts to much
The normals record 10.4 inches of snow a year here, most likely in February. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 6 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 29
50% probability date
Last Spring Freeze
April 8
50% probability date
Growing Season
204 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,977
Higher = more heating needed
Cooling Degree Days
1,634
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside IL closest to Anna 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 (59°F here).
- Berkeley, CA 59°F · 0.0°F off
- Cape Charles, VA 59°F · 0.0°F off
- Carthage, TN 59°F · 0.0°F off
- Cherokee, OK 59°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (51.1" here), excluding temperature-peer places.
- Mcdonough, GA 51.1" · 0.0" off
- Talbotton, GA 51.1" · 0.0" off
- Marianna, FL 51.1" · 0.0" off
- Sugar Land, TX 51.1" · 0.0" off
Data-derived climate profile
How Anna's climate pattern fits together
heating led · wet · mid swing
Anna's energy balance leans toward cold weather: 3,977 annual heating degree days against 1,634 for cooling. Its 43.9°F seasonal range still makes the monthly rows more useful than the annual average alone.
Anna's frost-free season lasts about 204 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Anna's middle-range seasonal profile. The measured spread is 43.9°F. The annual average is 59°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Anna carries 51.1 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 10.4 inches. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Anna's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Anna, not an official NOAA class or a year-ahead forecast.
Questions about Anna's climate
How much rain does Anna get? ▼
How many days above 90°F does Anna get? ▼
How much energy does heating and cooling require in Anna? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Anna's primary station: ANNA 2 NNE (USC00110187). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 1701543). Match rule for Anna: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Anna 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.