Union Hill-Novelty Hill weather in September
In September, Union Hill-Novelty Hill sees average daytime highs of 68°F and overnight lows near 49°F, with 3.7 in of rain across 9.2 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.
Highs ease over the month, from about 71°F in the first days to 65°F by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels dry.
Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Union Hill-Novelty Hill's 3rd-clearest and 9th-windiest month. For the whole year in context, see Union Hill-Novelty Hill's year-round climate.
- Daytime high
- 68°
- 3rd warmest
- Overnight low
- 49°
- 9th coldest
- Rainfall
- 3.7 in
- 9.2 wet days
- Daylight
- 12 h 18 min
- 5:52 AM – 6:13 PM
- Cloud cover
- 49%
- 3rd clearest
- Wind
- 4 mph
- 9th windiest
- Solar energy
- 4.01 kWh/m²
- Travel score
- 6.5
- out of 10
Union Hill-Novelty Hill is census designated place in King County, Washington, United States.
- Density
- 299/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 71°F in the first days to 65°F by the end.
A typical September day in Union Hill-Novelty Hill reaches about 68°F in the afternoon and slips back to 49°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 60°F and 78°F. Set against its neighbours, September runs about 6°F cooler than August and about 10°F warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 71 | 71 | 71 | 71 | 70 | 70 | 70 | 70 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 68 | 67 | 67 | 67 | 67 | 66 | 66 | 66 | 65 | 65 | 65 | 65 | 64 | 64 |
| Avg low (°F) | 52 | 52 | 52 | 51 | 51 | 51 | 51 | 51 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 49 | 49 | 49 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 46 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 71 | 52 |
| 2 | 71 | 52 |
| 3 | 71 | 52 |
| 4 | 71 | 51 |
| 5 | 71 | 51 |
| 6 | 70 | 51 |
| 7 | 70 | 51 |
| 8 | 70 | 51 |
| 9 | 70 | 51 |
| 10 | 69 | 51 |
| 11 | 69 | 51 |
| 12 | 69 | 50 |
| 13 | 69 | 50 |
| 14 | 68 | 50 |
| 15 | 68 | 50 |
| 16 | 68 | 50 |
| 17 | 68 | 49 |
| 18 | 67 | 49 |
| 19 | 67 | 49 |
| 20 | 67 | 49 |
| 21 | 67 | 49 |
| 22 | 66 | 48 |
| 23 | 66 | 48 |
| 24 | 66 | 48 |
| 25 | 65 | 48 |
| 26 | 65 | 47 |
| 27 | 65 | 47 |
| 28 | 65 | 47 |
| 29 | 64 | 47 |
| 30 | 64 | 46 |
How September really feels in Union Hill-Novelty Hill
Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Union Hill-Novelty Hill weather by month
How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 45° / 36° | 9.0 | 19 | 4 | 8.7 | 0.8 |
| Feb | 48° / 36° | 6.1 | 15.5 | 2.9 | 9.9 | 1.5 |
| Mar | 52° / 38° | 7.1 | 19.1 | 2.3 | 11.6 | 2.2 |
| Apr | 57° / 41° | 5.9 | 16.7 | 0.3 | 13.3 | 3.4 |
| May | 63° / 46° | 4.1 | 13.2 | 0 | 14.9 | 5.1 |
| Jun | 67° / 51° | 3.5 | 11.4 | 0 | 15.7 | 5.9 |
| Jul | 73° / 54° | 1.6 | 6.3 | 0 | 15.4 | 7.6 |
| Aug | 74° / 54° | 1.8 | 5.7 | 0 | 14.1 | 7.8 |
| Sep | 68° / 49° | 3.7 | 9.2 | 0 | 12.4 | 6.5 |
| Oct | 58° / 43° | 7.4 | 15.3 | 0 | 10.6 | 3.8 |
| Nov | 49° / 38° | 9.9 | 19.1 | 0.9 | 9.1 | 1.6 |
| Dec | 44° / 35° | 8.7 | 18.7 | 3.9 | 8.3 | 0.6 |
Cloud cover in September
The sky is clear or mostly clear about 40% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 45%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 59 | 58 | 58 | 59 | 59 | 59 | 59 | 58 | 58 | 57 | 56 | 56 | 55 | 55 | 54 | 55 | 54 | 54 | 54 | 54 | 53 | 54 | 53 | 53 | 53 | 53 | 53 | 52 | 52 | 50 |
| Cloudier (%) | 41 | 42 | 42 | 41 | 41 | 41 | 41 | 42 | 42 | 43 | 44 | 44 | 45 | 45 | 46 | 45 | 46 | 46 | 46 | 46 | 47 | 46 | 47 | 47 | 47 | 47 | 47 | 48 | 48 | 50 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 59 | 41 |
| 2 | 58 | 42 |
| 3 | 58 | 42 |
| 4 | 59 | 41 |
| 5 | 59 | 41 |
| 6 | 59 | 41 |
| 7 | 59 | 41 |
| 8 | 58 | 42 |
| 9 | 58 | 42 |
| 10 | 57 | 43 |
| 11 | 56 | 44 |
| 12 | 56 | 44 |
| 13 | 55 | 45 |
| 14 | 55 | 45 |
| 15 | 54 | 46 |
| 16 | 55 | 45 |
| 17 | 54 | 46 |
| 18 | 54 | 46 |
| 19 | 54 | 46 |
| 20 | 54 | 46 |
| 21 | 53 | 47 |
| 22 | 54 | 46 |
| 23 | 53 | 47 |
| 24 | 53 | 47 |
| 25 | 53 | 47 |
| 26 | 53 | 47 |
| 27 | 53 | 47 |
| 28 | 52 | 48 |
| 29 | 52 | 48 |
| 30 | 50 | 50 |
Chance of precipitation in September
Union Hill-Novelty Hill gets around 3.7 in of rain over 9.2 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 31% and peaks near 34% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 26 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 30 | 31 | 31 | 32 | 32 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 34 |
| Rain chance (%) | |
|---|---|
| 1 | 26 |
| 2 | 26 |
| 3 | 27 |
| 4 | 27 |
| 5 | 27 |
| 6 | 28 |
| 7 | 28 |
| 8 | 28 |
| 9 | 29 |
| 10 | 30 |
| 11 | 31 |
| 12 | 31 |
| 13 | 32 |
| 14 | 32 |
| 15 | 33 |
| 16 | 33 |
| 17 | 33 |
| 18 | 33 |
| 19 | 34 |
| 20 | 34 |
| 21 | 34 |
| 22 | 34 |
| 23 | 34 |
| 24 | 34 |
| 25 | 33 |
| 26 | 33 |
| 27 | 33 |
| 28 | 33 |
| 29 | 33 |
| 30 | 34 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 81% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 71 | 72 | 72 | 73 | 74 | 74 | 75 | 76 | 77 | 77 | 78 | 79 | 79 | 80 | 80 | 81 | 82 | 82 | 83 | 84 | 84 | 85 | 86 | 87 | 87 | 88 | 89 | 91 | 92 | 92 |
| Comfortable (%) | 28 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 22 | 22 | 21 | 20 | 20 | 19 | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 13 | 12 | 12 | 11 | 10 | 9 | 8 | 8 |
| Humid (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 71 | 28 | 1 |
| 2 | 72 | 27 | 1 |
| 3 | 72 | 27 | 1 |
| 4 | 73 | 26 | 1 |
| 5 | 74 | 25 | 1 |
| 6 | 74 | 25 | 1 |
| 7 | 75 | 24 | 1 |
| 8 | 76 | 23 | 1 |
| 9 | 77 | 22 | 1 |
| 10 | 77 | 22 | 1 |
| 11 | 78 | 21 | 1 |
| 12 | 79 | 20 | 1 |
| 13 | 79 | 20 | 1 |
| 14 | 80 | 19 | 1 |
| 15 | 80 | 19 | 1 |
| 16 | 81 | 18 | 1 |
| 17 | 82 | 17 | 1 |
| 18 | 82 | 17 | 1 |
| 19 | 83 | 16 | 1 |
| 20 | 84 | 15 | 1 |
| 21 | 84 | 15 | 1 |
| 22 | 85 | 14 | 1 |
| 23 | 86 | 13 | 1 |
| 24 | 87 | 12 | 1 |
| 25 | 87 | 12 | 1 |
| 26 | 88 | 11 | 1 |
| 27 | 89 | 10 | 1 |
| 28 | 91 | 9 | 0 |
| 29 | 92 | 8 | 0 |
| 30 | 92 | 8 | 0 |
Wind in September
Winds average 4 mph in September.
Across September, daily wind ranges from about 4 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 4 | calm |
| 2 | 4 | calm |
| 3 | 4 | calm |
| 4 | 4 | calm |
| 5 | 4 | calm |
| 6 | 4 | calm |
| 7 | 4 | calm |
| 8 | 4 | calm |
| 9 | 4 | calm |
| 10 | 4 | calm |
| 11 | 4 | calm |
| 12 | 4 | calm |
| 13 | 4 | calm |
| 14 | 4 | calm |
| 15 | 4 | calm |
| 16 | 4 | calm |
| 17 | 4 | calm |
| 18 | 4 | calm |
| 19 | 4 | calm |
| 20 | 4 | calm |
| 21 | 4 | calm |
| 22 | 4 | calm |
| 23 | 4 | calm |
| 24 | 4 | calm |
| 25 | 4 | calm |
| 26 | 4 | calm |
| 27 | 4 | calm |
| 28 | 4 | calm |
| 29 | 4 | calm |
| 30 | 4 | calm |
Sunrise & sunset in September
Daylight runs from about 13 h 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 102 minutes over September. Sunrise moves from 5:31 AM to 6:12 AM, and sunset from 6:44 PM to 5:43 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.2 | 13.2 | 13.1 | 13.0 | 13.0 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.7 | 11.7 | 11.6 | 11.6 | 11.5 |
| Sunrise (AM) | 5:31 | 5:33 | 5:34 | 5:36 | 5:37 | 5:38 | 5:40 | 5:41 | 5:43 | 5:44 | 5:45 | 5:47 | 5:48 | 5:49 | 5:51 | 5:52 | 5:54 | 5:55 | 5:56 | 5:58 | 5:59 | 6:01 | 6:02 | 6:03 | 6:05 | 6:06 | 6:08 | 6:09 | 6:11 | 6:12 |
| Sunset (PM) | 6:44 | 6:42 | 6:40 | 6:38 | 6:36 | 6:34 | 6:32 | 6:30 | 6:28 | 6:25 | 6:23 | 6:21 | 6:19 | 6:17 | 6:15 | 6:13 | 6:10 | 6:08 | 6:06 | 6:04 | 6:02 | 6:00 | 5:58 | 5:56 | 5:53 | 5:51 | 5:49 | 5:47 | 5:45 | 5:43 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.2 | 5:31 | 6:44 |
| 2 | 13.2 | 5:33 | 6:42 |
| 3 | 13.1 | 5:34 | 6:40 |
| 4 | 13.0 | 5:36 | 6:38 |
| 5 | 13.0 | 5:37 | 6:36 |
| 6 | 12.9 | 5:38 | 6:34 |
| 7 | 12.9 | 5:40 | 6:32 |
| 8 | 12.8 | 5:41 | 6:30 |
| 9 | 12.8 | 5:43 | 6:28 |
| 10 | 12.7 | 5:44 | 6:25 |
| 11 | 12.6 | 5:45 | 6:23 |
| 12 | 12.6 | 5:47 | 6:21 |
| 13 | 12.5 | 5:48 | 6:19 |
| 14 | 12.5 | 5:49 | 6:17 |
| 15 | 12.4 | 5:51 | 6:15 |
| 16 | 12.3 | 5:52 | 6:13 |
| 17 | 12.3 | 5:54 | 6:10 |
| 18 | 12.2 | 5:55 | 6:08 |
| 19 | 12.2 | 5:56 | 6:06 |
| 20 | 12.1 | 5:58 | 6:04 |
| 21 | 12.0 | 5:59 | 6:02 |
| 22 | 12.0 | 6:01 | 6:00 |
| 23 | 11.9 | 6:02 | 5:58 |
| 24 | 11.9 | 6:03 | 5:56 |
| 25 | 11.8 | 6:05 | 5:53 |
| 26 | 11.7 | 6:06 | 5:51 |
| 27 | 11.7 | 6:08 | 5:49 |
| 28 | 11.6 | 6:09 | 5:47 |
| 29 | 11.6 | 6:11 | 5:45 |
| 30 | 11.5 | 6:12 | 5:43 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.01 kWh/m².
For context, solar energy here swings from a low near 0.86 kWh/m² to a high of 6.13 kWh/m² in July across the year — September's 4.01 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.7 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.4 | 4.4 | 4.3 | 4.3 | 4.2 | 4.2 | 4.1 | 4.0 | 4.0 | 3.9 | 3.9 | 3.8 | 3.8 | 3.7 | 3.7 | 3.6 | 3.6 | 3.5 | 3.5 | 3.4 | 3.4 | 3.3 | 3.2 | 3.2 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.7 | Bright |
| 2 | 4.7 | Bright |
| 3 | 4.6 | Bright |
| 4 | 4.6 | Bright |
| 5 | 4.5 | Bright |
| 6 | 4.5 | Bright |
| 7 | 4.4 | Bright |
| 8 | 4.4 | Bright |
| 9 | 4.3 | Bright |
| 10 | 4.3 | Bright |
| 11 | 4.2 | Bright |
| 12 | 4.2 | Bright |
| 13 | 4.1 | Bright |
| 14 | 4.0 | Bright |
| 15 | 4.0 | Moderate |
| 16 | 3.9 | Moderate |
| 17 | 3.9 | Moderate |
| 18 | 3.8 | Moderate |
| 19 | 3.8 | Moderate |
| 20 | 3.7 | Moderate |
| 21 | 3.7 | Moderate |
| 22 | 3.6 | Moderate |
| 23 | 3.6 | Moderate |
| 24 | 3.5 | Moderate |
| 25 | 3.5 | Moderate |
| 26 | 3.4 | Moderate |
| 27 | 3.4 | Moderate |
| 28 | 3.3 | Moderate |
| 29 | 3.2 | Moderate |
| 30 | 3.2 | Moderate |
Hazard calendar for Union Hill-Novelty Hill
None of Union Hill-Novelty Hill's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Union Hill-Novelty Hill's rainy season runs October–April, when most of the year's rain falls.
Is September a good time to visit Union Hill-Novelty Hill?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Union Hill-Novelty Hill for sightseeing.
What to pack for Union Hill-Novelty Hill in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Union Hill-Novelty Hill sees daytime highs around 68°F and nights near 49°F. Worth packing: rain gear. About 9 days see rain.
UV index in Union Hill-Novelty Hill in September
Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Union Hill-Novelty Hill peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 17 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 4 | 5 | 7 | 6 | 8 | 6 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Union Hill-Novelty Hill in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Union Hill-Novelty Hill is worst in August — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 10 | 12 | 12 | 13 | 11 | 10 | 20 | 18 | 11 | 7 | 6 |
| Level | Good | Good | Moderate | Good | Moderate | Good | Good | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 10 | Good |
| Mar | 12 | Moderate |
| Apr | 12 | Good |
| May | 13 | Moderate |
| Jun | 11 | Good |
| Jul | 10 | Good |
| Aug | 20 | Moderate |
| Sep | 18 | Moderate |
| Oct | 11 | Good |
| Nov | 7 | Good |
| Dec | 6 | Good |
Where is Union Hill-Novelty Hill?
Union Hill-Novelty Hill sits at 47.7°N, 122.0°W, 551 ft above sea level, in United States. The nearest listed city is Sammamish, 3.7 mi away.
Topography around Union Hill-Novelty Hill
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Union Hill-Novelty Hill.
Within 2 miles, the terrain around Union Hill-Novelty Hill has only modest variations in elevation — a maximum elevation change of 689 ft around an average of 505 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,470 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,799 ft.
The land around Union Hill-Novelty Hill is covered by trees (85%) within 2 miles, trees (75%) within 10 miles, and trees (76%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Union Hill-Novelty Hill (47.6789°, -122.0283°, elevation 551 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).