Seasons by Latitude
Use day-length and sun tools to see how seasons feel different by latitude.
By Aryan Khan, Founder & Editor · Updated October 2026
For example, on June 21 New York gets 15.1 hours of daylight while London gets 16.6 and the equator gets its usual twelve — same day, three different planets of light.
How to use Seasons by Latitude
One tilt, every latitude its own version of the year:
Seasons by Latitude shows how the seasons play out at your latitude — day lengths at the solstices and equinoxes, and when your hemisphere leans toward the Sun. Pick a latitude and read the year's shape: fierce high up, gentle in the tropics, flipped down south.
- 1Pick latitude via a place.
- 2Compare day length across dates.
What people use Seasons by Latitude for
1. Teaching and homework
The page that makes 'why do we have seasons?' answerable with numbers — test the poles and the equator against the Polar Day / Night Checker.
2. Relocation reality checks
Moving from Miami to Minneapolis (or Manchester)? Your December daylight is about to change character — preview it here.
3. Gardening and growing seasons
Day length drives plants as much as temperature does; latitude sets the calendar both follow.
4. Travel timing
Southern-hemisphere trips invert everything: Sydney's Christmas is high summer, a fact this page makes mechanical rather than surprising.
Worked examples
Day length on the June solstice (computed): equator 12.0 h, New York 15.1 h, London 16.6 h, Tromsø 24 h. Latitude is the volume knob on the seasons.
Around March 20 and September 22, every latitude gets ~12 hours — computed New York: 12.1 h on March 20. The equinoxes are the year's two fair days.
The year's four hinges
Solstices and equinoxes — dates wobble by a day between years.
| Event | Usual date | What happens |
|---|---|---|
| March equinox | Mar 20 | Sun over the equator; ~12 h days worldwide |
| June solstice | Jun 21 | Northern summer peak; southern winter |
| September equinox | Sep 22 | Sun over the equator again |
| December solstice | Dec 21 | Southern summer peak; northern winter |
Seasons here are astronomical (tilt-driven). Meteorological seasons (whole months: DJF etc.) are the weather services' convention — both are used, for different jobs.
How to interpret the result
The most common errors come from using a correct result to answer the wrong geographic question. Keep these points in mind for Seasons by Latitude:
- For photography, plan around sun altitude, not clock time: golden hour is an altitude band, so its clock time migrates with the seasons even at a fixed place — the calculator's windows handle that for you.
- When comparing day length across a year, remember the curve is your latitude's signature: near-equatorial sites hover at twelve hours while high latitudes swing wildly. Choose expectations by latitude, not by calendar folklore.
Limits & appropriate use
Solar arithmetic's limits are small but real: the official zenith encodes average refraction, not today's atmosphere; coordinates are rounded to your input's precision; and terrain is absent unless you add height yourself — a mountain rises the sun late and the formulas won't know. Time adds the political layer: zones and DST are human law, and western edges of big zones (Spain, western China) make solar noon wander hours from clock noon. Every output here therefore carries its convention and both clocks, because an unanchored sunrise time is an argument, not a fact.
Lunar and seasonal outputs carry their own gentle limits: phase from the synodic approximation is hours-precise, which outruns every planning need but not ephemeris science; day length is geometric daylight, not sunshine, and clouds belong to climate's department. Escalation is rare and well-defined — astronomical almanacs and ephemerides for science, terrain-aware apps for mountain photography, and the tz database maintainers whenever a government invents a new DST rule at 48 hours' notice, as they delight in doing.
- Science-grade ephemerides → astronomical almanacs/JPL horizons.
- Mountain sunrise/sunset → terrain-aware horizon adjustments.
- Legal daylight definitions → jurisdictional statutes (they vary!).
Data & methodology
The daylight chart samples solar day length every three days across 2025 for the selected latitude; it is not a complete climate-season model.
For source details, licences and model limitations, see Data Sources and Methodology.
Key terms worth knowing
- Declination
- The sun's latitude-equivalent angle, ±23.44° across the year.
- Equation of time
- The sundial-vs-clock correction from orbit eccentricity and tilt.
Editorial guidance: MapBench explains the method and limitations so the tool can be used as a transparent reference, not as a black-box answer. For legal boundaries, safety-critical routing, surveying, engineering, regulated decisions or official statistics, verify the result with the responsible authority or a qualified professional.
Category: Sun & Moon. Results are intended for everyday analysis and planning unless a page explicitly states otherwise.
Method, assumptions & limits
- This tool’s method
- The daylight chart samples solar day length every three days across 2025 for the selected latitude; it is not a complete climate-season model.
- Before relying on the answer
- Check the date, location and time zone together. A solar or lunar event is tied to all three, and some events do not occur at high latitudes on a given date.
- What the result cannot establish
- A calculated event assumes the model's horizon and atmospheric conventions. Buildings, terrain and local weather can alter what you observe.
Coverage: Worldwide. Search, basemap and external data requests may use third-party services; browser-based does not mean every operation is offline. Read the source and licence notes, calculation methodology and privacy policy. If a result looks inconsistent, report a correction with the inputs and mode used.
Frequently asked questions
Clear answers about the calculation, accuracy and appropriate use.
Climate zones?
Day length is astronomical; climate also depends on oceans and altitude.
Are sunrise and solar times exact to what I will see?
Calculated events use astronomical geometry. Terrain, buildings, weather and atmospheric conditions can shift what an observer actually sees.
Does daylight saving change the Sun's position?
No. Daylight saving changes the civil clock label, not solar geometry. Timezone rules affect displayed local time.
Why can polar locations show unusual results?
High latitudes can have days when the Sun does not rise or set, so some solar events legitimately do not occur on a selected date.
What actually causes the seasons?
Earth's axis tilts 23.44° and keeps pointing the same way as we orbit, so each hemisphere takes its turn leaning sunward. Distance to the Sun is not the cause — Earth is nearest the Sun in early January.
Do the tropics have seasons?
Mild ones: day length and noon sun vary little inside the tropics, so seasons there are usually described as wet and dry instead of hot and cold.
Why are southern seasons flipped?
The same tilt, seen from the other hemisphere: December leans the south sunward. Their summer solstice is the north's winter one.
Equinox means exactly 12 hours?
Nearly — refraction and the Sun's size stretch the day slightly past 12 hours (New York computes to 12.1 h on March 20). The name promises equal night; geometry adds a tip.
How extreme can day length get?
From the equator's fixed ~12 h to the poles' single six-month day and night — the checker on this site tests any latitude's extremes.
Do seasons shift over centuries?
Slowly: the tilt itself wobbles between ~22.1° and 24.5° over ~41,000 years, which is why the tropics and circles creep (currently ~15 m a year).
Astronomical versus meteorological seasons?
Astronomers date from solstices/equinoxes; meteorologists use whole calendar months for statistics. Your forecast's 'first day of winter' (Dec 1) and the solstice (Dec 21) are both right, differently.
Does latitude change temperature directly?
It sets the Sun's angle and day length — the energy budget. Oceans, altitude and winds then argue with it, which is why London out-warms its latitude.
Related tools and resources
Extremes: the Polar Day / Night Checker; day lengths: the Day Length Calculator; the boundary lines: Tropics Finder.
More free tools
Sources, methodology & editorial trust
- ✓ Browser-first processing where supported
- ✓ External sources are documented
- ✓ No account required for public tools
- ✓ Review data sources
Calculations are documented with their assumptions, limitations and source context rather than presented as unexplained answers.
Reviewed and maintained by Aryan Khan, Founder & Editor of MapBench.
Part of our sun & moon hub
Seasons by Latitude sits in the sun & moon cluster, alongside 27 other tools that answer neighbouring questions with different methods or datasets.
You may also need
When this answer is only part of the job, these clusters cover the next step.
Read the guide behind this tool
Chasing Golden Hour: A Photographer's Solar Toolkit — Golden hour is an altitude band, not a fixed clock time. How to plan light with solar tools — windows, horizons and moon phase — instead of guessing.