Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 30°F annual avg Public-domain federal data
Big Delta, AK Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 30°F
- Avg annual temp
- 44/100
- Comfort score
- 10.3"
- Annual precip
- 113d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Big Delta
Big Delta, Alaska averages 30°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.
- 30°F
- yearly average temperature, NOAA normal
- 44/100
- comfort score, milder than 8% of U.S. cities
- 10.3"
- annual precipitation
- 113 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
30°F (-1°C)
Avg High
39°F
Avg Low
21°F
Annual Precip
10.3"
Comfort Score
44/100
Moderate
Avg Annual Temperature
30°F
30-year mean (NOAA NCEI)
Annual Precipitation
10.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Big Delta) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Big Delta area.
How Big Delta compares to every U.S. city
Big Delta's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 Top 92% higher than 8% 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 Big Delta
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Big Delta, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- 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 | 6°F (-14°C) | -8°F (-22°C) | -1°F (-18°C) | 0.2" | 30.9 | 0.0 |
| February | 16°F (-9°C) | -1°F (-18°C) | 7°F (-14°C) | 0.2" | 27.8 | 0.0 |
| March | 25°F (-4°C) | 4°F (-16°C) | 14°F (-10°C) | 0.2" | 30.3 | 0.0 |
| April | 44°F (7°C) | 24°F (-5°C) | 34°F (1°C) | 0.2" | 24.7 | 0.0 |
| May | 59°F (15°C) | 38°F (3°C) | 49°F (9°C) | 0.8" | 6.6 | 0.0 |
| June | 68°F (20°C) | 49°F (9°C) | 59°F (15°C) | 2.2" | 0.3 | 0.1 |
| July | 70°F (21°C) | 52°F (11°C) | 61°F (16°C) | 2.4" | 0.0 | 0.0 |
| August | 65°F (18°C) | 47°F (8°C) | 56°F (13°C) | 2.0" | 0.6 | 0.0 |
| September | 53°F (12°C) | 36°F (2°C) | 45°F (7°C) | 0.9" | 9.5 | 0.0 |
| October | 33°F (1°C) | 20°F (-7°C) | 27°F (-3°C) | 0.6" | 27.3 | 0.0 |
| November | 15°F (-9°C) | 1°F (-17°C) | 8°F (-13°C) | 0.4" | 29.9 | 0.0 |
| December | 9°F (-13°C) | -5°F (-20°C) | 2°F (-16°C) | 0.2" | 31.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.2"
5.9 days with precipitation
February 0.2"
5.1 days with precipitation
March 0.2"
3.7 days with precipitation
April 0.2"
3.7 days with precipitation
May 0.8"
7.9 days with precipitation
June 2.2"
12.9 days with precipitation
July 2.4"
14.0 days with precipitation
August 2.0"
12.8 days with precipitation
September 0.9"
8.5 days with precipitation
October 0.6"
7.8 days with precipitation
November 0.4"
7.4 days with precipitation
December 0.2"
6.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 7
50% probability date
Last Spring Freeze
May 17
50% probability date
Growing Season
113 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
12,783
Higher = more heating needed
Cooling Degree Days
34
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 78% | 11.8 | 17% | 34% |
| February | 66% | 10.0 | 19% | 35% |
| March | 56% | 9.2 | 21% | 34% |
| April | 48% | 8.5 | 8% | 33% |
| May | 49% | 8.0 | 4% | 34% |
| June | 59% | 6.7 | 2% | 38% |
| July | 64% | 7.1 | 1% | 45% |
| August | 66% | 7.3 | 2% | 44% |
| September | 69% | 8.5 | 3% | 50% |
| October | 78% | 10.0 | 5% | 52% |
| November | 75% | 11.8 | 14% | 40% |
| December | 83% | 12.2 | 18% | 36% |
What Big Delta's climate means for you
Big Delta runs 30°F a year - peaking in July, coldest in January.
- Gardeners get about 113 frost-free days, with the last spring freeze near May 17 - plan the planting calendar around it, not the regional average.
- Energy bills track 12,783 heating and 34 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: Big Delta, AK
An annual average temperature of 30°F, ranging from a mean daily high of 39°F to a mean daily low of 21°F is what the NOAA 1991–2020 climate normals report for Big Delta, Alaska. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USW00026415 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Big Delta receives roughly 10.3 inches of precipitation each year, predominantly as rainfall. The frost-free season averages 113 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 7. For energy use, 12,783 heating degree days and 34 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Big Delta scores 44/100 (Moderate), 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 Big Delta, AK? ▼
The average annual temperature in Big Delta, Alaska is 30°F. The warmest month averages 70°F (21°C) and the coldest averages -8°F (-22°C).
How much rain does Big Delta get? ▼
Big Delta receives 10.3 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Big Delta? ▼
Big Delta has a climate comfort score of 44/100 (Moderate), milder than 8% of U.S. cities in the PlainClimate database.
When is the growing season in Big Delta? ▼
Big Delta has approximately 113 frost-free days per year, with the last spring freeze around May 17 and the first fall freeze around September 7.
How much energy does heating and cooling require in Big Delta? ▼
Big Delta has 12,783 heating degree days and 34 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 Big Delta climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00026415 near Big Delta.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00026415. 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.