Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 48°F annual avg Public-domain federal data
Castleford, ID Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 48°F
- Avg annual temp
- 54/100
- Comfort score
- 10.7"
- Annual precip
- 135d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Castleford
Castleford, Idaho averages 48°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 48°F
- yearly average temperature, NOAA normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 10.7"
- annual precipitation
- 135 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
61°F
Avg Low
35°F
Annual Precip
10.7"
Comfort Score
54/100
Moderate
Avg Annual Temperature
48°F
30-year mean (NOAA NCEI)
Annual Precipitation
10.7"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Castleford) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Castleford area.
How Castleford compares to every U.S. city
Castleford's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 Top 73% higher than 27% 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 Castleford
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Castleford 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 | 36°F (2°C) | 20°F (-6°C) | 28°F (-2°C) | 1.2" | 28.3 | 0.0 |
| February | 42°F (6°C) | 23°F (-5°C) | 33°F (0°C) | 1.1" | 23.7 | 0.0 |
| March | 53°F (12°C) | 28°F (-2°C) | 41°F (5°C) | 1.0" | 20.2 | 0.0 |
| April | 60°F (16°C) | 33°F (0°C) | 47°F (8°C) | 1.2" | 10.9 | 0.0 |
| May | 70°F (21°C) | 41°F (5°C) | 55°F (13°C) | 1.4" | 2.5 | 0.5 |
| June | 78°F (26°C) | 47°F (8°C) | 63°F (17°C) | 0.8" | 0.1 | 4.2 |
| July | 88°F (31°C) | 54°F (12°C) | 71°F (22°C) | 0.2" | 0.0 | 16.4 |
| August | 86°F (30°C) | 52°F (11°C) | 69°F (21°C) | 0.3" | 0.0 | 11.5 |
| September | 76°F (25°C) | 44°F (7°C) | 60°F (16°C) | 0.5" | 0.5 | 1.2 |
| October | 62°F (17°C) | 35°F (2°C) | 48°F (9°C) | 0.8" | 9.7 | 0.0 |
| November | 47°F (8°C) | 26°F (-4°C) | 36°F (2°C) | 0.9" | 21.6 | 0.0 |
| December | 35°F (2°C) | 19°F (-7°C) | 27°F (-3°C) | 1.3" | 28.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.2"
February 1.1"
March 1.0"
April 1.2"
May 1.4"
June 0.8"
July 0.2"
August 0.3"
September 0.5"
October 0.8"
November 0.9"
December 1.3"
Frost Dates & Growing Season
First Fall Freeze
September 29
50% probability date
Last Spring Freeze
May 17
50% probability date
Growing Season
135 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,563
Higher = more heating needed
Cooling Degree Days
434
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Castleford's climate means for you
Castleford runs 48°F a year - peaking in July, coldest in December.
- Gardeners get about 135 frost-free days, with the last spring freeze near May 17 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,563 heating and 434 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: Castleford, ID
Based on station USC00101551 feeding NOAA's 1991–2020 climate normals, Castleford, Idaho averages 48°F a year, ranging from a mean daily high of 61°F to a mean daily low of 35°F. July is typically the warmest month of the year, while December is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Castleford averages 10.7 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 135 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 17 and the first fall freeze near September 29. As for energy demand, 6,563 heating degree days and 434 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Castleford scores 54/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings December-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Castleford, ID? ▼
The average annual temperature in Castleford, Idaho is 48°F. The warmest month averages 88°F (31°C) and the coldest averages 19°F (-7°C).
How much rain does Castleford get? ▼
Castleford receives 10.7 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Castleford? ▼
Castleford has a climate comfort score of 54/100 (Moderate), milder than 27% of U.S. cities in the PlainClimate database.
When is the growing season in Castleford? ▼
Castleford has approximately 135 frost-free days per year, with the last spring freeze around May 17 and the first fall freeze around September 29.
How much energy does heating and cooling require in Castleford? ▼
Castleford has 6,563 heating degree days and 434 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 Castleford climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00101551 near Castleford.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00101551. 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.