Slow Travel Constraints: Weather

Post 4 in the Slow Travel series · Constraint #1: Weather

In Post 2 I introduced the constraint system — 11 filters that decide where we go. Weather is the first one, because it's the most ruthless. A place can be cheap, safe, beautiful, and full of opportunities. If the weather makes daily life miserable for six weeks, none of that matters.

This isn't about chasing perfect beach days. It's about sleep, routines, and whether the kids can play outside on a normal Tuesday. These filters reflect our family as it is now. They'll shift as we do — that's why the system is built to be tuned, not carved in stone.

People hear "weather constraints" and think high-maintenance. It's the opposite. The planet has hundreds of places with great weather in any given month. We're not limiting our options by being specific — we're choosing from an enormous list of places that actually fit, instead of landing somewhere and gutting it out. Exacting standards don't require gated communities or expensive cities. They just require paying attention. Can we handle bad weather? I've lived year-round in Chicago, Minneapolis, Montana, Boston, and Nederland, Colorado — 8,200 feet in the Rockies. I've proven that point enough times. I'm just done volunteering for it. We'll save the adapting for World War III — LifeEducation.org will prepare the kids for that just fine. For everyday slow travel, we'd rather just pick places where the weather works.

What We're Actually Filtering For

We travel in two modes. Overseas bases — apartments or houses where we stay for six or more weeks. And North America road and camping — tent, truck, and camper across regions for weeks at a time. Each mode has its own weather profile because sleeping in an apartment and sleeping in a tent are two very different situations.

For overseas bases, we care about four things:

— Temperature. Can we sleep well? Can the kids play outside without overheating or freezing? Daytime sweet spot is roughly 65–80°F. Nighttime lows below 50°F on a regular basis are a dealbreaker — cold nights wreck sleep and make mornings miserable, especially with young kids. A couple of cold nights per month is tolerable. A pattern of them is not.

— Heat limits. A hot afternoon is fine. A week straight where it "feels like" 90°F and nighttime lows won't drop below 80°F? That's not a hot day — that's an endurance test. Oppressive heat that won't break is a hard fail.

— Rain. Rain is fine. We actually like rain when we've got a roof and the temperature is good. But more than three or four rainy days per week for a long stay starts to cage the kids and kill routines.

— Air quality. This one surprised me during research. Some of the most popular slow-travel destinations have seasons where the air is genuinely dangerous — not just unpleasant, but hazardous for children. And it's not just Asia. Wildfire smoke season in the western US and parts of Europe is the same problem with a different source. We strongly avoid anywhere with AQI over 150 as a regular pattern.

For camping, the rules tighten. Nighttime lows need to stay above roughly 65°F unless we've got a proper heated setup. Severe weather is a non-starter with young kids in a tent. Multi-day rain while camping is miserable for everyone.

What Passes: Places That Actually Work

Medellín, Colombia — Nearly any month. They call it the City of Eternal Spring and it earns the name. Year-round temperatures between roughly 62–78°F. Nighttime lows in the mid-60s. Humidity is moderate. It rains, but usually in afternoon bursts, not all-day soakers. Medellín doesn't just pass the weather filter — by our filters, it barely has a bad month.

Lisbon, Portugal — October. Highs around 73°F, lows around 59°F. Still warm enough for outdoor life, but the summer crush of tourists has cleared out. Rain starts picking up toward November, but October is mostly dry with long sunny stretches. Shoulder season in southern Europe is exactly the kind of window this filter is designed to find.

Chiang Mai, Thailand — November through January. This is the cool, dry season. Highs in the low 80s, lows in the low 60s, almost no rain, eight hours of sunshine. Beautiful. Cheap. Great food. It's one of the best slow-travel bases in Southeast Asia — but only in the right months. More on that in a second.

What Fails: Same System, Different Verdict

Bangkok, Thailand — April. Average highs around 97°F. Lows around 80°F — at night. Humidity pushing 70% and up. The heat index can feel like 127°F. That's not "it's hot out" — that's dangerous for small children. We have young kids. This is an automatic no for us.

Delhi, India — November and December. The temperature is actually fine. The problem is the air. Delhi's AQI routinely hits 300 to 500+ during these months — deep into "hazardous" territory. In November 2024 it spiked above 1,200. Schools close. Hospitals fill up with respiratory cases. The government has declared public health emergencies. With a 4-year-old and a 2-year-old, this is not a place to be breathing that air for weeks.

Chiang Mai, Thailand — February through April. Same city that passed with flying colors in November. But from February to April, the burning season hits. Farmers across northern Thailand, Laos, and Myanmar burn fields and forests. The smoke settles into Chiang Mai's valley like a bowl. AQI regularly sits at 150–200, with spikes above 400 and occasionally above 700. Locals with money leave town. Expats call it "the smoky season" and plan around it. We would too.

This is the example I keep coming back to, because it shows exactly why a constraint system matters. Chiang Mai isn't a good destination or a bad destination. It's a great destination in the right months and a terrible one in the wrong months. Without a weather filter that tracks air quality by season, you'd never catch that.

The Borderline: When the Filter Gets Interesting

Oaxaca, Mexico — January and February. Days are gorgeous — mid-70s to low 80s, dry, sunny, almost no rain. But nighttime lows dip to around 49°F in January. That's right at our hard floor of 50°F. In a well-insulated apartment with blankets, it's probably fine. In a drafty rental, it's cold mornings and cranky kids.

This is where the system shows its flexibility. Oaxaca doesn't automatically fail — but it gets flagged, and we'd need to check the specific housing before committing to a long stay. The constraint is a filter, not a verdict. It tells us what to investigate, not what to skip blindly.

The Tricks: How We Chase Good Weather

The weather filter doesn't just say no. It also suggests strategies:

— Altitude-chasing. Too hot in the lowlands? Move higher. A city at 5,000 feet, like Medellín, can be 15–20 degrees cooler than the coast below it.

— Coastal moderation. Oceans buffer extremes. Coastal cities tend to have milder highs and warmer lows than inland cities at the same latitude.

— Shoulder-season routing. The cheapest, least crowded, and most comfortable months are often the ones just before and after peak tourist season. Lisbon in October instead of August. Chiang Mai in November instead of March.

— Hemisphere swaps. When it's winter in the Northern Hemisphere, it's summer in the Southern. When the burning season hits Southeast Asia, head south. The planet has good weather somewhere at all times, and the game is lining up where you are with when it's good to be there.

What This Looks Like in Practice

The question is never just "is Chiang Mai good?" Sometimes it's a specific city plus a time window: "How about Chiang Mai from November 1 to January 15?" or "Does Madrid work from April 15 to July 1?" or "Can we do Oaxaca for six weeks starting mid-December?"

But just as often, we'll go broad: "Give me 20 places that meet all of our constraints for a trip from June 1 through August 1." That's where the system really earns its keep. We're not picking from a list of places we've already heard of. We're letting the filters surface places we might never have considered, because the data says they work.

Either way, the weather filter evaluates that specific combination of place and dates. Same city, different dates, completely different answer. Chiang Mai from November to January? Clears easily. Chiang Mai from February to April? Hard fail. Madrid in May? Probably great. Madrid in August? Probably an oven.

Every pass/fail in this post is a place plus a time window — because that's how the system actually works. No destination is good or bad in the abstract. It's good or bad for the weeks you'd actually be there.

Once the weather filter clears a place-and-dates combo, it gets passed to the next filters: safety, housing, budget, visa. No single filter picks the destination. But weather clears the field fast — and it does it without opinions or arguments. Just data against preferences.

Build the system. Test it. Tune it. Keep the record.