Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 49°F annual avg Public-domain federal data
Hartline, WA Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 49°F
- Avg annual temp
- 54/100
- Comfort score
- 10.9"
- Annual precip
- 163d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Hartline
Hartline, Washington averages 49°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 49°F
- yearly average temperature, NOAA normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 10.9"
- annual precipitation
- 163 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
49°F (9°C)
Avg High
59°F
Avg Low
38°F
Annual Precip
10.9"
Comfort Score
54/100
Moderate
Avg Annual Temperature
49°F
30-year mean (NOAA NCEI)
Annual Precipitation
10.9"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Hartline) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Hartline area.
How Hartline compares to every U.S. city
Hartline'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 Hartline
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Hartline 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 | 32°F (0°C) | 23°F (-5°C) | 28°F (-2°C) | 1.3" | 28.6 | 0.0 |
| February | 40°F (4°C) | 25°F (-4°C) | 33°F (0°C) | 0.7" | 23.2 | 0.0 |
| March | 50°F (10°C) | 31°F (-1°C) | 40°F (5°C) | 1.0" | 18.8 | 0.0 |
| April | 60°F (15°C) | 36°F (2°C) | 48°F (9°C) | 0.8" | 8.9 | 0.0 |
| May | 70°F (21°C) | 44°F (7°C) | 57°F (14°C) | 1.1" | 2.0 | 0.6 |
| June | 76°F (25°C) | 49°F (10°C) | 63°F (17°C) | 0.9" | 0.1 | 2.6 |
| July | 86°F (30°C) | 57°F (14°C) | 72°F (22°C) | 0.6" | 0.0 | 14.2 |
| August | 86°F (30°C) | 57°F (14°C) | 71°F (22°C) | 0.4" | 0.0 | 11.9 |
| September | 76°F (25°C) | 48°F (9°C) | 62°F (17°C) | 0.3" | 0.4 | 2.5 |
| October | 60°F (16°C) | 38°F (3°C) | 49°F (9°C) | 0.9" | 6.8 | 0.0 |
| November | 43°F (6°C) | 29°F (-1°C) | 36°F (2°C) | 1.3" | 20.2 | 0.0 |
| December | 33°F (0°C) | 23°F (-5°C) | 28°F (-2°C) | 1.6" | 27.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.3"
February 0.7"
March 1.0"
April 0.8"
May 1.1"
June 0.9"
July 0.6"
August 0.4"
September 0.3"
October 0.9"
November 1.3"
December 1.6"
Frost Dates & Growing Season
First Fall Freeze
October 12
50% probability date
Last Spring Freeze
May 2
50% probability date
Growing Season
163 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,443
Higher = more heating needed
Cooling Degree Days
560
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Hartline's climate means for you
Hartline runs 49°F a year - peaking in July, coldest in January.
- Gardeners get about 163 frost-free days, with the last spring freeze near May 2 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,443 heating and 560 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: Hartline, WA
In Hartline, Washington, the NOAA 1991–2020 climate normals put the annual average temperature at 49°F, ranging from a mean daily high of 59°F to a mean daily low of 38°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00453529, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Anyone planning to live, garden, or travel in Hartline should weigh precipitation alongside temperature: the annual average runs 10.9 inches, predominantly as rainfall. The frost-free season averages 163 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 2 and the first fall freeze near October 12. And on the energy front, 6,443 heating degree days and 560 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Hartline scores 54/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Hartline, WA? ▼
The average annual temperature in Hartline, Washington is 49°F. The warmest month averages 86°F (30°C) and the coldest averages 23°F (-5°C).
How much rain does Hartline get? ▼
Hartline receives 10.9 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Hartline? ▼
Hartline 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 Hartline? ▼
Hartline has approximately 163 frost-free days per year, with the last spring freeze around May 2 and the first fall freeze around October 12.
How much energy does heating and cooling require in Hartline? ▼
Hartline has 6,443 heating degree days and 560 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 Hartline climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00453529 near Hartline.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00453529. 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.