Climate Comfort Score
90/100
Excellent
NOAA 1991–2020 normals 73°F annual avg Public-domain federal data
Castle Hot Springs, AZ Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 73°F
- Avg annual temp
- 90/100
- Comfort score
- 14.3"
- Annual precip
- 341d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Castle Hot Springs
Castle Hot Springs, Arizona averages 73°F a year and scores 90/100 on the comfort index - excellent, milder than 94% of U.S. cities.
- 73°F
- annual average temperature (NOAA normal)
- 90/100
- comfort score, milder than 94% of U.S. cities
- 14.3"
- annual precipitation
- 341 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
73°F (23°C)
Avg High
87°F
Avg Low
58°F
Annual Precip
14.3"
Annual Snow
0.0"
Comfort Score
90/100
Excellent
Avg Annual Temperature
73°F
30-year mean (NOAA NCEI)
Annual Precipitation
14.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Castle Hot Springs) 90.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Castle Hot Springs area.
How Castle Hot Springs compares to every U.S. city
Castle Hot Springs's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
90 Top 6% higher than 94% 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 Castle Hot Springs
MethodologyZooming out from Castle Hot Springs's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- 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 | 70°F (21°C) | 43°F (6°C) | 56°F (13°C) | 2.0" | 0.0" | 1.5 | 0.0 |
| February | 71°F (22°C) | 45°F (7°C) | 58°F (14°C) | 2.1" | 0.0" | 0.5 | 0.0 |
| March | 77°F (25°C) | 49°F (10°C) | 63°F (17°C) | 1.6" | 0.0" | 0.0 | 0.8 |
| April | 84°F (29°C) | 54°F (12°C) | 69°F (21°C) | 0.4" | 0.0" | 0.0 | 5.7 |
| May | 93°F (34°C) | 62°F (16°C) | 77°F (25°C) | 0.2" | 0.0" | 0.0 | 18.4 |
| June | 102°F (39°C) | 70°F (21°C) | 86°F (30°C) | 0.1" | 0.0" | 0.0 | 28.0 |
| July | 105°F (41°C) | 77°F (25°C) | 91°F (33°C) | 1.3" | 0.0" | 0.0 | 30.7 |
| August | 104°F (40°C) | 77°F (25°C) | 91°F (33°C) | 2.3" | 0.0" | 0.0 | 30.5 |
| September | 99°F (37°C) | 71°F (22°C) | 85°F (30°C) | 1.1" | 0.0" | 0.0 | 27.4 |
| October | 89°F (32°C) | 60°F (16°C) | 75°F (24°C) | 0.9" | 0.0" | 0.0 | 12.6 |
| November | 78°F (25°C) | 50°F (10°C) | 64°F (18°C) | 0.7" | 0.0" | 0.3 | 1.0 |
| December | 68°F (20°C) | 43°F (6°C) | 55°F (13°C) | 1.4" | 0.0" | 2.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.0"
3.0 days with precipitation
February 2.1"
3.8 days with precipitation
March 1.6"
3.0 days with precipitation
April 0.4"
1.0 days with precipitation
May 0.2"
0.9 days with precipitation
June 0.1"
0.3 days with precipitation
July 1.3"
2.5 days with precipitation
August 2.3"
4.6 days with precipitation
September 1.1"
2.2 days with precipitation
October 0.9"
1.9 days with precipitation
November 0.7"
1.7 days with precipitation
December 1.4"
2.5 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 22
50% probability date
Last Spring Freeze
January 15
50% probability date
Growing Season
341 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,046
Higher = more heating needed
Cooling Degree Days
3,842
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Castle Hot Springs's climate means for you
Castle Hot Springs runs 73°F a year - peaking in July, coldest in December.
- Gardeners get about 341 frost-free days, with the last spring freeze near January 15 - plan the planting calendar around it, not the regional average.
- Energy bills track 1,046 heating and 3,842 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: Castle Hot Springs, AZ
The NOAA 1991–2020 climate normals describe Castle Hot Springs, Arizona as a location with an annual average temperature of 73°F, ranging from a mean daily high of 87°F to a mean daily low of 58°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00021353, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Beyond temperature, Castle Hot Springs averages 14.3 inches of precipitation annually, with negligible snowfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 341 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 15 and the first fall freeze near December 22. Turning to energy use, 1,046 heating degree days and 3,842 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Castle Hot Springs scores 90/100 (Excellent), 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 Castle Hot Springs, AZ? ▼
The average annual temperature in Castle Hot Springs, Arizona is 73°F. The warmest month averages 105°F (41°C) and the coldest averages 43°F (6°C).
How much rain does Castle Hot Springs get? ▼
Castle Hot Springs receives 14.3 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Castle Hot Springs? ▼
Castle Hot Springs has a climate comfort score of 90/100 (Excellent), milder than 94% of U.S. cities in the PlainClimate database.
When is the growing season in Castle Hot Springs? ▼
Castle Hot Springs has approximately 341 frost-free days per year, with the last spring freeze around January 15 and the first fall freeze around December 22.
How much energy does heating and cooling require in Castle Hot Springs? ▼
Castle Hot Springs has 1,046 heating degree days and 3,842 cooling degree days annually, a cooling-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 Castle Hot Springs climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00021353 near Castle Hot Springs.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00021353. 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.