Climate Comfort Score
59/100
Moderate
NOAA 1991–2020 normals 48°F annual avg Public-domain federal data
Little Sioux, IA Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 48°F
- Avg annual temp
- 59/100
- Comfort score
- 39.8"
- Annual precip
- 155d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Little Sioux
Little Sioux, Iowa averages 48°F a year and scores 59/100 on the comfort index - moderate, milder than 39% of U.S. cities.
- 48°F
- yearly average temperature, NOAA normal
- 59/100
- comfort score, milder than 39% of U.S. cities
- 39.8"
- annual precipitation · 46" snow
- 155 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
48°F (9°C)
Avg High
60°F
Avg Low
36°F
Annual Precip
39.8"
Annual Snow
45.6"
Comfort Score
59/100
Moderate
Avg Annual Temperature
48°F
30-year mean (NOAA NCEI)
Annual Precipitation
39.8"
Plus 45.6" of snow
Comfort score vs national 100-point ceiling (Little Sioux) 59.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Little Sioux area.
How Little Sioux compares to every U.S. city
Little Sioux's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
59 Top 61% higher than 39% 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 Little Sioux
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Little Sioux's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 29°F (-1°C) | 9°F (-13°C) | 19°F (-7°C) | 0.9" | 10.0" | 30.6 | 0.0 |
| February | 34°F (1°C) | 13°F (-11°C) | 23°F (-5°C) | 1.3" | 13.4" | 27.6 | 0.0 |
| March | 48°F (9°C) | 24°F (-4°C) | 36°F (2°C) | 2.3" | 6.9" | 24.3 | 0.0 |
| April | 62°F (17°C) | 35°F (1°C) | 48°F (9°C) | 3.9" | 1.9" | 13.2 | 0.4 |
| May | 73°F (23°C) | 48°F (9°C) | 60°F (16°C) | 5.1" | 0.3" | 1.9 | 1.8 |
| June | 83°F (28°C) | 59°F (15°C) | 71°F (21°C) | 5.7" | 0.0" | 0.0 | 6.1 |
| July | 86°F (30°C) | 62°F (17°C) | 74°F (23°C) | 4.8" | 0.0" | 0.0 | 9.8 |
| August | 83°F (29°C) | 60°F (16°C) | 72°F (22°C) | 4.5" | 0.0" | 0.0 | 5.0 |
| September | 77°F (25°C) | 50°F (10°C) | 64°F (18°C) | 5.0" | 0.0" | 1.2 | 2.8 |
| October | 64°F (18°C) | 37°F (3°C) | 51°F (10°C) | 2.9" | 1.0" | 11.9 | 0.3 |
| November | 48°F (9°C) | 24°F (-5°C) | 36°F (2°C) | 1.7" | 2.3" | 24.4 | 0.0 |
| December | 34°F (1°C) | 14°F (-10°C) | 24°F (-5°C) | 1.5" | 9.8" | 30.5 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.9"
Snow: 10.0"
8.1 days with precipitation
February 1.3"
Snow: 13.4"
8.3 days with precipitation
March 2.3"
Snow: 6.9"
9.2 days with precipitation
April 3.9"
Snow: 1.9"
10.3 days with precipitation
May 5.1"
Snow: 0.3"
13.9 days with precipitation
June 5.7"
12.6 days with precipitation
July 4.8"
10.4 days with precipitation
August 4.5"
9.6 days with precipitation
September 5.0"
9.7 days with precipitation
October 2.9"
Snow: 1.0"
9.3 days with precipitation
November 1.7"
Snow: 2.3"
5.7 days with precipitation
December 1.5"
Snow: 9.8"
7.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 3
50% probability date
Last Spring Freeze
May 1
50% probability date
Growing Season
155 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,983
Higher = more heating needed
Cooling Degree Days
864
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Little Sioux's climate means for you
Little Sioux runs 48°F a year - peaking in July, coldest in January.
- Gardeners get about 155 frost-free days, with the last spring freeze near May 1 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,983 heating and 864 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: Little Sioux, IA
The NOAA 1991–2020 climate normals describe Little Sioux, Iowa as a location with an annual average temperature of 48°F, ranging from a mean daily high of 60°F to a mean daily low of 36°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00134874, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Little Sioux receives roughly 39.8 inches of precipitation each year, with 45.6 inches typically falling as snow. The frost-free season averages 155 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 1 and the first fall freeze near October 3. For energy use, 6,983 heating degree days and 864 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Little Sioux scores 59/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings July-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Little Sioux, IA? ▼
The average annual temperature in Little Sioux, Iowa is 48°F. The warmest month averages 86°F (30°C) and the coldest averages 9°F (-13°C).
How much rain does Little Sioux get? ▼
Little Sioux receives 39.8 inches of precipitation annually, including 45.6 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Little Sioux? ▼
Little Sioux has a climate comfort score of 59/100 (Moderate), milder than 39% of U.S. cities in the PlainClimate database.
When is the growing season in Little Sioux? ▼
Little Sioux has approximately 155 frost-free days per year, with the last spring freeze around May 1 and the first fall freeze around October 3.
How much energy does heating and cooling require in Little Sioux? ▼
Little Sioux has 6,983 heating degree days and 864 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 Little Sioux climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00134874 near Little Sioux.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00134874. 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.