Pokemon Go has long frustrated rural players due to a lack of Poke Stops and Pokemon spawn points outside the city. Not only do rural Pokemon Go players have to travel long distances just to obtain a handful of items from a Poke Stop, they also can't rely on Pokemon Go's tracker system, which relies on Poke Stops to signal where Pokemon are located.
And since Pokemon Go seems to use cellular/data traffic to help inform how often their Pokemon spawn, living in the countryside means encountering only a handful of Pokemon per day.
Occasionally, anecdotal reports on Reddit or Twitter will surface claiming that rural spawns have increased, but these typically can't be corroborated and never last more than a day or two. However, during the latest wave of increased spawn reports, a Pokemon Go fansite claims to have hard evidence that rural spawns did in fact increase over the weekend.
Pokemon Go Hub, a Pokemon fansite, claims that they have data that shows that Pokemon spawns did increase in rural areas over the weekend. The site worked with a player who has a third party tracker system that monitors a stretch of land in rural Croatia. According to the data, spawns in the area gradually increased by 15% over a two day period. Although the rarity of spawns didn't change, the fact that there were more Pokemon to catch meant that there was a better chance that a rare Pokemon would show up.
Pokemon Go Hub has a.....mixed reputation, so it's best to take this report with a grain of salt. Still, players might want to take the weekend to play some Pokemon Go and see if they notice any increase in Pokemon spawns.