Climate Comfort Score
64/100
Good
NOAA 1991–2020 normals 45°F annual avg Public-domain federal data
Stanley, IA Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 45°F
- Avg annual temp
- 64/100
- Comfort score
- 38.6"
- Annual precip
- 150d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Stanley
Stanley, Iowa averages 45°F a year and scores 64/100 on the comfort index - good, milder than 51% of U.S. cities.
- 45°F
- annual average temperature (NOAA normal)
- 64/100
- comfort score, milder than 51% of U.S. cities
- 38.6"
- annual precipitation
- 150 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
45°F (7°C)
Avg High
56°F
Avg Low
35°F
Annual Precip
38.6"
Comfort Score
64/100
Good
Avg Annual Temperature
45°F
30-year mean (NOAA NCEI)
Annual Precipitation
38.6"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Stanley) 64.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Stanley area.
How Stanley compares to every U.S. city
Stanley's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 Top 49% higher than 51% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Stanley
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Stanley captures average conditions across the spread shown, the most recent decade is warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 25°F (-4°C) | 7°F (-14°C) | 16°F (-9°C) | 1.2" | 30.7 | 0.0 |
| February | 29°F (-1°C) | 9°F (-13°C) | 19°F (-7°C) | 1.2" | 27.5 | 0.0 |
| March | 43°F (6°C) | 23°F (-5°C) | 33°F (1°C) | 2.0" | 24.5 | 0.0 |
| April | 58°F (14°C) | 34°F (1°C) | 46°F (8°C) | 4.0" | 13.7 | 0.0 |
| May | 70°F (21°C) | 46°F (8°C) | 58°F (14°C) | 4.8" | 1.7 | 0.7 |
| June | 79°F (26°C) | 57°F (14°C) | 68°F (20°C) | 5.8" | 0.0 | 1.9 |
| July | 82°F (28°C) | 59°F (15°C) | 71°F (21°C) | 5.3" | 0.0 | 3.5 |
| August | 80°F (26°C) | 57°F (14°C) | 68°F (20°C) | 4.0" | 0.0 | 1.7 |
| September | 74°F (23°C) | 48°F (9°C) | 61°F (16°C) | 3.7" | 0.9 | 0.9 |
| October | 61°F (16°C) | 36°F (2°C) | 49°F (9°C) | 3.1" | 12.1 | 0.0 |
| November | 44°F (7°C) | 24°F (-4°C) | 34°F (1°C) | 2.1" | 22.6 | 0.0 |
| December | 31°F (-1°C) | 14°F (-10°C) | 22°F (-5°C) | 1.6" | 29.5 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.2"
February 1.2"
March 2.0"
April 4.0"
May 4.8"
June 5.8"
July 5.3"
August 4.0"
September 3.7"
October 3.1"
November 2.1"
December 1.6"
Frost Dates & Growing Season
First Fall Freeze
October 1
50% probability date
Last Spring Freeze
May 4
50% probability date
Growing Season
150 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,646
Higher = more heating needed
Cooling Degree Days
537
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Stanley's climate means for you
Stanley runs 45°F a year - peaking in July, coldest in January.
- Gardeners get about 150 frost-free days, with the last spring freeze near May 4 - plan the planting calendar around it, not the regional average.
- Energy bills track 7,646 heating and 537 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Stanley, IA
In Stanley, Iowa, the NOAA 1991–2020 climate normals put the annual average temperature at 45°F, ranging from a mean daily high of 56°F to a mean daily low of 35°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00137892, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Beyond temperature, Stanley averages 38.6 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 150 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 4 and the first fall freeze near October 1. Turning to energy use, 7,646 heating degree days and 537 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Stanley scores 64/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in Stanley, IA? ▼
The average annual temperature in Stanley, Iowa is 45°F. The warmest month averages 82°F (28°C) and the coldest averages 7°F (-14°C).
How much rain does Stanley get? ▼
Stanley receives 38.6 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Stanley? ▼
Stanley has a climate comfort score of 64/100 (Good), milder than 51% of U.S. cities in the PlainClimate database.
When is the growing season in Stanley? ▼
Stanley has approximately 150 frost-free days per year, with the last spring freeze around May 4 and the first fall freeze around October 1.
How much energy does heating and cooling require in Stanley? ▼
Stanley has 7,646 heating degree days and 537 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Stanley climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00137892 near Stanley.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00137892. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.